1981 Pontiac LeMans Engine Internals
Keep Your 1981 Pontiac LeMans in Top Shape with Quality Engine Internals
Whether you’re repairing or upgrading your Engine Internal, using high-quality parts is key to keeping your 1981 Pontiac LeMans looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Standard Individual Rod Bearings, Standard Rod Bearing Sets, and Crankshaft Bolts. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.
Competitive Prices and Extensive Inventory
The average price for a 1981 Pontiac LeMans Engine Internal at Advance Auto Parts is around $62.39, with a range that starts at $6.29 and goes up to $354.99. With 18 options in stock from 2 trusted brands, finding the right fit is easy. Popular picks like Engine Connecting Rod Bearing Set, For Use With Chevy Small Block, 5/8" Socket Size, 3/4" – 16 Thread Size, and For Use With Chevy Small Block Large Journal, 4 Bolt Main, Hex Head, Chrome Moly start at just $39.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Engine Internal, don’t forget to check out other key components like Engine Gaskets and Seals and Engine Timing Parts. At Advance Auto Parts, we’re here to help you keep your 1981 Pontiac LeMans in peak condition, inside and out.
Find Your Specific 1981 Pontiac LeMans Engine Internals
Looking for the perfect Engine Internal for your 1981 Pontiac LeMans? You’re in the right place. Below, you’ll find links to various types of Engine Internals that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Engine Internals, ensuring durability and a precise fit for your Pontiac LeMans. Whether you’re driving a 1981 model or another popular model year like
1978,
1979,
1980,
1988,
1989,
1990,
1991,
1992, and
1993, we’ve got you covered. Purchasing Engine Internals from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Engine Internals that fit your vehicle.
Essential 1981 Pontiac LeMans Engine Internals
Sealed Power – Engine Crankshaft Main Bearing Set (Part No.4281M 10)
from
$81.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- Steel-backed bronze alloy lining with overplate
- Popular for fatigue resistance & strength – provides conformability required for older applications
- State-of-the-art manufacturing
- Exacting tolerances
- Meets or exceeds OEM specifications
Sealed Power – Main Bearing Set (Part No.139M 11)
from
$85.99
Speed-Pro delivers the power you need and the value and quality that you deserve. Whether you are running at the track, chasing trophies on the strip, or just cruising down the road, count on Speed-Pro to provide the best value in HP engine components
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- IROX coating
- Polymer coating enhances bearing
- Made with silicon for greater surface hardness
- Silicon particles help polish crankshaft journal (reduces wear during operation)
Sealed Power – Engine Crankshaft Main Bearing Set (Part No.5085MA 40)
from
$67.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- Reduces dramatically or eliminates bearing wear
- Exacting tolerances
- Meets or exceeds OEM specifications
- Made with silicon to provide greater surface hardness
Sealed Power – Engine Crankshaft Main Bearing Set (Part No.4124MA 30)
from
$64.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- Reduces dramatically or eliminates bearing wear
- Exacting tolerances
- Meets or exceeds OEM specifications
- Made with silicon to provide greater surface hardness
Sealed Power – Engine Piston (Part No.WH423DCP 40)
from
$19.49
Sealed Power parts provide innovative designs, use leading-edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- Hypereutectic
- Made with exclusive FM425 material for excellent strength & scuff resistance – allows tighter bore and improves sealing for less blow-by
- Sophisticated “barrel” profiles help optimize oil wedge between skirt and wall.
- Piston skirts protected by next-gen DUROSHIELD coating.
- TAC ring groove geometry
- Weight matched to +/- 2 grams.
Sealed Power – Engine Piston Set (Part No.287P 30)
from
$58.99
Sealed Power« Vintage components provide coverage for applications over 35 years old, restoring classics with like new performance. Leading edge materials, ISO & QS certified manufacturing ensures performance and longevity for treasured engine rebuilds.
Product Features:
See More
Product Features:
- Cast with FM132 Eutectic proprietary alloy
- Performance & dependability of original equipment pistons
- High quality aluminum
- Utilizes ISO & QS certified manufacturing
- Meets or exceeds OEM specifications
Sealed Power – Power Forged Piston (Part No.L-2262F 30)
from
$44.49
Speed-Pro delivers the power you need and the value and quality that you deserve. Whether you are running at the track, chasing trophies on the strip, or just cruising down the road, count on Speed-Pro to provide the best value in HP engine components
Product Features:
See More
Product Features:
- TAC ring groove geometry
- Weight matched to +/- 2 grams
- Piston skirts protected by next-gen DUROSHIELD coating
- Exclusive higher-strength FM-425 alloy with 16.5% silicon finely dispersed throughout the material
- Sophisticated barrel profiles help optimize oil wedge between skirt and wall
- Machined valve reliefs and circlip grooves; LR-63 lock rings for floated applications
Sealed Power – Engine Piston Set (Part No.H423DCP 40)
from
$19.29
Sealed Power parts provide innovative designs, use leading-edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- Hypereutectic
- Made with exclusive FM425 material for excellent strength & scuff resistance – allows tighter bore and improves sealing for less blow-by
- Sophisticated “barrel” profiles help optimize oil wedge between skirt and wall.
- Piston skirts protected by next-gen DUROSHIELD coating.
- TAC ring groove geometry
- Weight matched to +/- 2 grams.
Sealed Power – Engine Connecting Rod Bearing (Part No.2020CP 10)
from
$6.79
Sealed Power parts provide innovative designs, use leading-edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- Steel-backed bronze alloy lining with overplate
- Popular for fatigue resistance & strength
- Provides conformability required for older apps
- Our standard material is comparable to competitors performance bearing
- Note – This material offers less resistance to wear & corrosion than other materials.
- Utilizes ISO & QS certified manufacturing
Sealed Power – Engine Connecting Rod Bearing (Part No.2555CP 1)
from
$6.29
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- Steel-backed bronze alloy lining with overplate
- Popular for fatigue resistance & strength
- Provides conformability required for older apps
- Our standard material is comparable to competitors performance bearing
- Note – This material offers less resistance to wear & corrosion than other materials.
- Utilizes ISO & QS certified manufacturing
Sealed Power – Engine Connecting Rod Bearing (Part No.2020CP 30)
from
$7.49
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- Steel-backed bronze alloy lining with overplate
- Popular for fatigue resistance & strength
- Provides conformability required for older apps
- Our standard material is comparable to competitors performance bearing
- Note – This material offers less resistance to wear & corrosion than other materials.
- Utilizes ISO & QS certified manufacturing
Sealed Power – Engine Connecting Rod Bearing (Part No.3045A 10)
from
$8.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- Dramatically reduces or eliminates bearing wear
- Made with silicon to provide greater surface hardness
- Silicon particles help polish crankshaft journal to further reduce wear during operation
- Utilizes ISO & QS certified manufacturing
Sealed Power – Engine Connecting Rod Bearing (Part No.2555A 20)
from
$5.99
Sealed Power parts provide innovative designs, use leading-edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- Dramatically reduces or eliminates bearing wear
- Made with silicon to provide greater surface hardness
- Silicon particles help polish crankshaft journal to further reduce wear during operation
- Utilizes ISO & QS certified manufacturing
Sealed Power – Engine Connecting Rod Bearing Set (Part No.8-2555CP 30)
from
$74.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- Steel-backed bronze alloy lining with overplate
- Popular for fatigue resistance & strength
- Provides conformability required for older apps
- Our standard material is comparable to competitors performance bearing
- Note – This material offers less resistance to wear & corrosion than other materials.
- Utilizes ISO & QS certified manufacturing
Sealed Power – Engine Connecting Rod Bearing Set (Part No.8-3045A 20)
from
$51.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- Dramatically reduces or eliminates bearing wear
- Made with silicon to provide greater surface hardness
- Silicon particles help polish crankshaft journal to further reduce wear during operation
- Utilizes ISO & QS certified manufacturing
Sealed Power – Engine Connecting Rod Bearing Set (Part No.4-4210CP)
from
$49.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- Steel-backed bronze alloy lining with overplate
- Popular for fatigue resistance & strength
- Provides conformability required for older apps
- Our standard material is comparable to competitors performance bearing
- Note – This material offers less resistance to wear & corrosion than other materials.
- Utilizes ISO & QS certified manufacturing
Sealed Power – Engine Connecting Rod Bearing Set (Part No.6-2020CP)
from
$45.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- Steel-backed bronze alloy lining with overplate
- Popular for fatigue resistance & strength
- Provides conformability required for older apps
- Our standard material is comparable to competitors performance bearing
- Note – This material offers less resistance to wear & corrosion than other materials.
- Utilizes ISO & QS certified manufacturing
Sealed Power – Engine Connecting Rod Bearing Set (Part No.8-3045A 10)
from
$55.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- Dramatically reduces or eliminates bearing wear
- Made with silicon to provide greater surface hardness
- Silicon particles help polish crankshaft journal to further reduce wear during operation
- Utilizes ISO & QS certified manufacturing
ARP Auto Racing – For Use With Chevy Small Block Large Journal, 4 Bolt Main, Hex Head, Chrome Moly (Part No.134-5202)
from
$85.99
Far superior to any other main bolt kit offered for use in competition engines, ARP main bolts are designed to meet the exacting standards and demands of professional engine builders. Forged from 8740 chrome moly, all bolts feature generous under head radius and rolled threads for the utmost reliability. The threads are rolled after heat treating, which makes them about 1000 Percent longer fatigue life than most main bolts, which are threaded prior to heat treating. Available in the popular High Performance Series, which, at a nominal rating of 180,000 PSI, is a premium replacement for OEM fasteners, or the 200,000 PSI nominal rated Pro Series, application specific main bolts with reduced wrenching head and are designed for use in competition applications. Parallel ground, hardened washers are included with each kit.
Product Features:
See More
Product Features:
- Forged From Premium Grade 8740 Chrome Moly Steel
- Generous Under Head Radius And Rolled Threads For The Utmost Reliability
- Threads Are Rolled After Heat Treating, Which Makes Them About 1000 Percent Longer Fatigue Life Than Most Main Bolts, Which Are Threaded Prior To Heat Treating
- Parallel Ground, Hardened Washers Are Included With Each Kit
- Large Journal
- Sold As A Kit
- 180,000 PSI
ARP Auto Racing – For Use With Chevy Small Block, 5/8" Socket Size, 3/4" – 16 Thread Size (Part No.134-2501)
from
$39.99
As the crankshaft flexes and twists, the balancer absorbs incredible amounts of kinetic energy. To ensure that the balancer is locked in position, ARP has developed these ultra strong 200,000 PSI bolts that let you exert maximum clamping force. Special features include 1/4 Inch thick, wide area washer and an extra tall 12 point head that accepts a deep socket and eliminates the worry of stripping the head.
Product Features:
See More
Product Features:
- Ultra Strong Bolt Rated At 200,000 PSI
- 1/4 Inch Thick, Wide Area Washer And An Extra Tall 12 Point Head That Accepts A Deep Socket And Eliminates The Worry Of Stripping The Head
- Delivers ARP Quality And Reliability
- Made In USA
- 12-Point Head
- Sold Individually
- 200,000 PSI
- 2.470″ Underhead Length
Spectre – Chevrolet Small Block V8 Harmonic Balancer Bolt Kit (Part No.4699)
from
$7.99
Spectre’s Harmonic Balancer Bolt Kit is designed to fit Chevrolet Small Block 265-400 V8 engines. This grade 8 bolt is 2-1/2 inches long, and features a plated finish for corrosion resistance. This kit also includes a security lock washer.
Product Features:
See More
Product Features:
- Fits Chevrolet Small Block 265-400 V8 engines
- Features a corrosion resistant plated finish
- Gold iridite finish
- Grade 8 bolt, 7/16 inch-20 by 2-1/2 inches
- Includes security lock washer
Mr. Gasket – Ultra Seal: Harmonic Balancer Bolt/Washer Kit (Part No.7845)
from
$31.99
Secure the harmonic balancer or dampener on your Chevy. Works on original equipment, high performance street, drag or circle track applications. Features a heat treated black oxide coated Grade 8 alloy steel bolt for strength with a tall hex head to prevent wrench from slipping. An extra thick parallel ground washer provides accurate, uniform torque, and a lock washer is also included.
Product Features:
See More
Product Features:
- Heat treated black oxide coated Grade 8 alloy steel
- Tall hex head bolt to prevent wrench from slipping
- Extra thick parallel ground washer provides accurate, uniform torque
- Washers Provides More Accurate And Uniform Torque
- Grade 8 Alloy Steel
ARP Auto Racing – For Use With Chevy Gen Iii/Ls Series Small Block/ Gmpp Lsx Block, Hex Head (Part No.234-5608)
from
$354.99
There are many important reasons to use ARP main stud kits, including the elimination of main cap walk and fretting, as well as protecting the threads in your engine block. All kits come complete with hardened parallel ground washers and high quality nuts. Some applications have provisions for mounting wind age trays and have specially designed standoff studs with serrated lock nuts to position the wind age tray and lock it securely in place. The studs are manufactured from 8740 chrome moly steel, heat treated in-house to 200,000 Pounds Per Square Inch tensile strength, and precision J-form threads rolled after heat treat to create a fastener that has threads 1000 Percent stronger than others.
Product Features:
See More
Product Features:
- Kit Come Complete With Hardened Parallel Ground Washers And High Quality Nuts
- Manufactured From 8740 Chrome Moly Steel
- Heat Treated To 200,000 Pounds Per Square Inch
- Precision J-Form Threads Rolled After Heat Treat To Create A Fastener That Has Threads 1000 Percent Stronger Than Others
- 200,000 PSI
- Sold As A Kit
Sealed Power – Engine Piston Ring Set (Part No.E-222K)
from
$63.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- Face of top rings coated with latest generation Plasma-Moly
- Decreases friction
- Very resistant to scuffing
- Exacting tolerances
- Meets or exceeds OEM specifications
Sealed Power – Engine Piston Ring Set (Part No.E-356X 40)
from
$77.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- Unsurpassed quality that you can trust
- Uses leading edge materials
- State-of-the-art manufacturing
- Exacting tolerances
- Meets or exceeds OEM specifications
Sealed Power – Engine Piston Ring Set (Part No.E-251K 10)
from
$64.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- Face of top rings coated with latest generation Plasma-Moly
- Decreases friction
- Very resistant to scuffing
- Exacting tolerances
- Meets or exceeds OEM specifications
Sealed Power – Engine Piston Ring Set (Part No.E-378X)
from
$66.99
Sealed Power« Vintage components provide coverage for applications over 35 years old, restoring classics with like new performance. Leading edge materials, ISO & QS certified manufacturing ensures performance and longevity for treasured engine rebuilds.
Product Features:
See More
Product Features:
- Unsurpassed quality that you can trust
- Uses leading edge materials
- State-of-the-art manufacturing
- Exacting tolerances
- Meets or exceeds OEM specifications
Sealed Power – Premiumium Piston Ring Set (Part No.R-9903)
from
$192.99
Speed-Pro delivers the power you need and the value and quality that you deserve. Whether you are running at the track, chasing trophies on the strip, or just cruising down the road, count on Speed-Pro to provide the best value in HP engine components
Product Features:
See More
Product Features:
- Application-specific design for perfect fit and correct operation
- Face of top rings coated with latest-generation plasma-moly
- Plasma-moly ring face decreases friction and resists scuffing
- Delivers dependable performance and superior service life
- Recommended for all racing applications (where file fitting the ring end gap delivers maximum power)
Popular 1981 Pontiac LeMans Engine Internals Categories
Most Popular Standard Individual Rod Bearings for 1981 Pontiac LeMans
Enhance your 1981 Pontiac LeMans with one of the 3 Standard Individual Rod Bearings we have in stock, starting at just $6.29.
Sealed Power – Engine Connecting Rod Bearing (Part No.2500RAA)
from
$9.29
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- Dramatically reduces or eliminates bearing wear
- Made with silicon to provide greater surface hardness
- Silicon particles help polish crankshaft journal to further reduce wear during operation
- Utilizes ISO & QS certified manufacturing
Sealed Power – Engine Connecting Rod Bearing (Part No.2500RAA 10)
from
$8.79
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- Dramatically reduces or eliminates bearing wear
- Made with silicon to provide greater surface hardness
- Silicon particles help polish crankshaft journal to further reduce wear during operation
- Utilizes ISO & QS certified manufacturing
Sealed Power – Engine Connecting Rod Bearing (Part No.3755A)
from
$6.29
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More
Best-Selling 1981 Pontiac LeMans Standard Rod Bearing Sets
Upgrade your LeMans with one of our 4 best-selling Standard Rod Bearing Sets.
Sealed Power – Engine Connecting Rod Bearing Set (Part No.6-3755A)
from
$41.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- Dramatically reduces or eliminates bearing wear
- Made with silicon to provide greater surface hardness
- Silicon particles help polish crankshaft journal to further reduce wear during operation
- Utilizes ISO & QS certified manufacturing
Sealed Power – Engine Connecting Rod Bearing Set (Part No.6-3755A 30)
from
$38.49
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- Dramatically reduces or eliminates bearing wear
- Made with silicon to provide greater surface hardness
- Silicon particles help polish crankshaft journal to further reduce wear during operation
- Utilizes ISO & QS certified manufacturing
Sealed Power – Engine Connecting Rod Bearing Set (Part No.8-2500RAA 10)
from
$36.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- Dramatically reduces or eliminates bearing wear
- Made with silicon to provide greater surface hardness
- Silicon particles help polish crankshaft journal to further reduce wear during operation
- Utilizes ISO & QS certified manufacturing
Sealed Power – Engine Connecting Rod Bearing Set (Part No.8-2500RAA)
from
$36.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- Dramatically reduces or eliminates bearing wear
- Made with silicon to provide greater surface hardness
- Silicon particles help polish crankshaft journal to further reduce wear during operation
- Utilizes ISO & QS certified manufacturing
Top-Quality Crankshaft Bolts for 1981 Pontiac LeMans
Choose a high-quality OEM or aftermarket Crankshaft Bolt for Pontiac LeMans and enjoy top-notch performance from $39.99.
ARP Auto Racing – For Use With Chevy Small Block, 5/8" Socket Size, 3/4" – 16 Thread Size (Part No.134-2501)
from
$39.99
As the crankshaft flexes and twists, the balancer absorbs incredible amounts of kinetic energy. To ensure that the balancer is locked in position, ARP has developed these ultra strong 200,000 PSI bolts that let you exert maximum clamping force. Special features include 1/4 Inch thick, wide area washer and an extra tall 12 point head that accepts a deep socket and eliminates the worry of stripping the head.
Product Features:
See More
Product Features:
- Ultra Strong Bolt Rated At 200,000 PSI
- 1/4 Inch Thick, Wide Area Washer And An Extra Tall 12 Point Head That Accepts A Deep Socket And Eliminates The Worry Of Stripping The Head
- Delivers ARP Quality And Reliability
- Made In USA
- 12-Point Head
- Sold Individually
- 200,000 PSI
- 2.470″ Underhead Length
ARP Auto Racing – For Use With Chevy Small Block Large Journal, 4 Bolt Main, Hex Head, Chrome Moly (Part No.134-5202)
from
$85.99
Far superior to any other main bolt kit offered for use in competition engines, ARP main bolts are designed to meet the exacting standards and demands of professional engine builders. Forged from 8740 chrome moly, all bolts feature generous under head radius and rolled threads for the utmost reliability. The threads are rolled after heat treating, which makes them about 1000 Percent longer fatigue life than most main bolts, which are threaded prior to heat treating. Available in the popular High Performance Series, which, at a nominal rating of 180,000 PSI, is a premium replacement for OEM fasteners, or the 200,000 PSI nominal rated Pro Series, application specific main bolts with reduced wrenching head and are designed for use in competition applications. Parallel ground, hardened washers are included with each kit.
Product Features:
See More
Product Features:
- Forged From Premium Grade 8740 Chrome Moly Steel
- Generous Under Head Radius And Rolled Threads For The Utmost Reliability
- Threads Are Rolled After Heat Treating, Which Makes Them About 1000 Percent Longer Fatigue Life Than Most Main Bolts, Which Are Threaded Prior To Heat Treating
- Parallel Ground, Hardened Washers Are Included With Each Kit
- Large Journal
- Sold As A Kit
- 180,000 PSI
ARP Auto Racing – For Use With Chevy Gen Iii/Ls Series Small Block/ Gmpp Lsx Block, Hex Head (Part No.234-5608)
from
$354.99
There are many important reasons to use ARP main stud kits, including the elimination of main cap walk and fretting, as well as protecting the threads in your engine block. All kits come complete with hardened parallel ground washers and high quality nuts. Some applications have provisions for mounting wind age trays and have specially designed standoff studs with serrated lock nuts to position the wind age tray and lock it securely in place. The studs are manufactured from 8740 chrome moly steel, heat treated in-house to 200,000 Pounds Per Square Inch tensile strength, and precision J-form threads rolled after heat treat to create a fastener that has threads 1000 Percent stronger than others.
Product Features:
See More
Product Features:
- Kit Come Complete With Hardened Parallel Ground Washers And High Quality Nuts
- Manufactured From 8740 Chrome Moly Steel
- Heat Treated To 200,000 Pounds Per Square Inch
- Precision J-Form Threads Rolled After Heat Treat To Create A Fastener That Has Threads 1000 Percent Stronger Than Others
- 200,000 PSI
- Sold As A Kit
Top Picks for 1981 Pontiac LeMans Oversized Main Bearings
Invest in one of our 5 durable Oversized Main Bearings for your 1981 Pontiac, knowing you’re getting trusted brands and expert craftsmanship.
Sealed Power – Engine Crankshaft Main Bearing Set (Part No.7144MA)
from
$59.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- Reduces dramatically or eliminates bearing wear
- Exacting tolerances
- Meets or exceeds OEM specifications
- Made with silicon to provide greater surface hardness
Sealed Power – Main Bearing Set (Part No.107M)
from
$92.99
Speed-Pro delivers the power you need and the value and quality that you deserve. Whether you are running at the track, chasing trophies on the strip, or just cruising down the road, count on Speed-Pro to provide the best value in HP engine components
Product Features:
See More
Product Features:
- H14 Super Duty alloy material
- Best bronze alloy material
- Does not have flash tin plating
- Extreme fatigue resistance & strength
- 1/2 Grooved
- Silicon particles help polish crankshaft journal (reduces wear during operation)
Sealed Power – Engine Crankshaft Main Bearing Set (Part No.7144MA 10)
from
$60.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- Reduces dramatically or eliminates bearing wear
- Exacting tolerances
- Meets or exceeds OEM specifications
- Made with silicon to provide greater surface hardness
Sealed Power – Engine Crankshaft Main Bearing Set (Part No.7144MA 40)
from
$56.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- Reduces dramatically or eliminates bearing wear
- Exacting tolerances
- Meets or exceeds OEM specifications
- Made with silicon to provide greater surface hardness
Sealed Power – Engine Crankshaft Main Bearing Set (Part No.7144MA 30)
from
$56.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- A-Series bi-metal aluminum alloy
- Greater seizure resistance than tri-metal material
- Reduces dramatically or eliminates bearing wear
- Exacting tolerances
- Meets or exceeds OEM specifications
- Made with silicon to provide greater surface hardness
Standard Piston Rings for 1981 Pontiac LeMans
Make a smart move for your 1981 Pontiac LeMans with products all priced from $86.99 to $92.99.
Sealed Power – Engine Piston Ring Set (Part No.E-377K)
from
$92.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- Face of top rings coated with latest generation Plasma-Moly
- Decreases friction
- Very resistant to scuffing
- Exacting tolerances
- Meets or exceeds OEM specifications
Sealed Power – Engine Piston Ring Set (Part No.E-377X)
from
$86.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
Product Features:
See More
Product Features:
- Unsurpassed quality that you can trust
- Uses leading edge materials
- State-of-the-art manufacturing
- Exacting tolerances
- Meets or exceeds OEM specifications
FAQs for 1981 Pontiac LeMans Engine Internals
What are the best-selling Engine Internals for 1981 Pontiac LeMans?
Out of 18 Engine Internals that fit 1981 Pontiac LeMans, the following parts are the top sellers:
- Engine Connecting Rod Bearing Set (19693597) – $41.99
- For Use With Chevy Small Block, 5/8" Socket Size, 3/4" – 16 Thread Size (11530225) – $39.99
- For Use With Chevy Small Block Large Journal, 4 Bolt Main, Hex Head, Chrome Moly (11530053) – $85.99
What’s the price range for 1981 Pontiac LeMans Engine Internals?
The prices of Engine Internals for the 1981 Pontiac LeMans range from $6.29 up to $354.99 for the most premium parts.
What is the average price of an Engine Internal for a 1981 Pontiac LeMans?
The average price for Engine Internals for the 1981 Pontiac LeMans is $62.39. Keep in mind the variety of part types within our Engine Internal category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Engine Internals for other Pontiac LeMans model years?
What are the cheapest Engine Internals for my 1981 Pontiac LeMans?
The cheapest 1981 Pontiac LeMans Engine Internals we carry are:
- Engine Connecting Rod Bearing (3695204) – $6.29
- Engine Connecting Rod Bearing (3704467) – $8.79
- Engine Connecting Rod Bearing (3695069) – $9.29
- Engine Connecting Rod Bearing Set (19693532) – $36.99
- Engine Connecting Rod Bearing Set (19693535) – $36.99
Does Advance Auto Parts sell Engine Internals for any other 1981 Pontiac models?
Yes. We stock Engine Internals for 5 other popular 1981 Pontiac models. Some of the most popular are 1981 Grand Prix Engine Internals, 1981 Bonneville Engine Internals, 1981 Firebird Engine Internals, 1981 Catalina Engine Internals, and 1981 Phoenix Engine Internals.
What types of Engine Internals do you sell for my 1981 Pontiac LeMans?
As of 11/2/25, these are some of the most in-demand types of Engine Internals for a 1981 Pontiac LeMans:
Can I get help with 1981 Pontiac LeMans Engine Internal orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Pontiac Engine Internals and more.
What is your return policy for Pontiac LeMans Engine Internals?
Advance Auto Parts keeps returns simple. For new Pontiac LeMans Engine Internals and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.