1980 GMC C2500 Engine Internals

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 Pounds Per Square Inch bolts that let you exert maximum clamping force. Special features comes with 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:

• Ultra Strong Bolt Rated At 200,000 Pounds Per Square Inch
• 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
• Sold Individually
• 7/16″-20 RH Thread Size
• 2.47″ Underhead Length
• 200,000 PSI

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:

• 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
• Sold Individually
• 200,000 PSI
• 1.55″ Underhead Length
• 5/8″ 12-Point Socket

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:

• Hypereutectic
• Made w/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® 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:

• Helps improve cylinder sealing for less blow-by
• Retains standard ring gaps in top groove
• DUROSHIELD« skirt-coated piston
• Moly-graphite coating extends engine life
• Reduces friction for higher fuel economy
• Prevents damage from inadequate lubrication on start-up

Crankshaft Seal

National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.

Product Features:

• Low swell in hydrocarbon fluids
• Design type: spring loaded; multi-lip
• Provides good low temperature capability
• Temperature range: -40°F to 225°F; -40°C to 107°C
• Delivers quality and reliable performance for every type of repair

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:

• Hypereutectic
• Made w/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® 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:

• Hypereutectic
• Made w/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® 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:

• Hypereutectic
• Made w/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.

Short style. The offset cam and crankshaft key is another method to increase torque and horsepower within the operating range you select.

Product Features:

• Increases Low-End Torque
• Increases Mid-Range Horsepower
• Reduces Low-End Torque
• Increases Top-End Horsepower

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:

• 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« 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:

• 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

Clevite is the number one name in replacement engine bearings, delivering on the track and in machine shops around the country. With track proven performance in engines with thousands of horsepower, it is obvious Clevite has the strength to handle any light vehicle application. As more and more OE manufacturers shift to aluminum bearings in OE engines, Clevite has introduced a new line of engine bearings designed to be the highest quality replacement bearings in the industry. Clevite BiMetal engine bearings carry on the tradition and reputation that Clevite has built throughout the course of time. Clevite BiMetal engine bearings feature a 100% lead free aluminum silicon bi-metal material, which includes 60% more silicon than the leading competitor’s bi-metal material for better conditioning of journal surfaces. These BiMetal bearings also offer greater wear resistance than the leading competitor’s bi-metal material, as well as greater seizure resistance. Clevite BiMetal bearings feature 100% bored ID’s for precision and surface characteristics and where appropriate – straight shell main bearings utilizing an umbrella groove that allows for superior oil control and improved pressure.

Product Features:

• Original Equipment Manufacturer
• Maximum Load-Bearing Capacity
• Fatigue-Resistant, adaptable
• Resistant to Wear and Corrosion
• Advanced Surface Coatings

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:

• 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« 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:

• Face of top rings coated with latest generation Plasma-Moly
• Decreases friction
• Very resistant to scuffing
• Exacting tolerances
• Meets or exceeds OEM specifications

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:

• 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)

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:

• 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

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:

• 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® 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:

• Steel-backed bronze alloy lining with overplate
• Popular for fatigue resistance & strength – provides conformability required for older applications
• Cast; Use w/E-356K, E-356KC or E-356X ring set; For use w/350 crank w/o need to rebalance engine
• Exacting tolerances
• Meets or exceeds OEM specifications

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:

• A-Series bi-metal aluminum alloy
• Greater seizure resistance than tri-metal material
• Oversize
• Additional oversize OD allows for cost effective reconditioning
• Meets or exceeds OEM specifications
• Made with silicon to provide greater surface hardness

This engine connecting rod nut is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:

• Direct replacement – this engine connecting rod nut matches the fit and function of the factory part on specified years, makes and models
• Ideal solution – this nut is a reliable replacement for an original part that is missing or has failed due to fatigue
• Durable construction – this part is made from quality materials to ensure reliable performance and long service life
• Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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:

• Steel-backed Babbitt lining material
• For use in automotive and high-performance applications
• Babbitt designed to deform under extreme loads without damaging other engine parts
• Meets unique demands of performance engines
• Delivers dependable performance and superior service life
• Application-specific design for perfect fit and correct operation

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:

• 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« 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:

• 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« 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:

• 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« 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:

• 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« 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:

• 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

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:

• Steel-backed Babbitt lining material
• For use in automotive and high-performance applications
• Babbitt designed to deform under extreme loads without damaging other engine parts
• Meets unique demands of performance engines
• Delivers dependable performance and superior service life
• Application-specific design for perfect fit and correct operation