1989 Mercury Cougar Performance Engines
Keep Your 1989 Mercury Cougar in Top Shape with Quality Performance Engines
Whether you’re repairing or upgrading your Performance Engine, using high-quality parts is key to keeping your 1989 Mercury Cougar looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Performance Engine Push Rods, Performance Engine Valve Springs, and Performance Engine Valve Spring Retainer. 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.
Top-Rated Performance Engines from Trusted Brands
Looking for a reliable Performance Engine? We’ve got you covered with options from brands you know and trust like Competition Cams. For example, Competition Cams Performance Engines start at just $528.99 with an average 4.1 star rating. With over 94 reviews and a solid 4 star average, you can shop with confidence knowing other Mercury Cougar owners approve.
Competitive Prices and Extensive Inventory
The average price for a 1989 Mercury Cougar Performance Engine at Advance Auto Parts is around $123.88, with a range that starts at $10.99 and goes up to $528.99. With 14 options in stock from 2 trusted brands, finding the right fit is easy. Popular picks like High Performance Thermostat, Steel Retainer for Set of 16, and ENGINE ROCKER ARM start at just $31.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Performance Engine, don’t forget to check out other key components like Performance Distributors and Performance Ignition Products. At Advance Auto Parts, we’re here to help you keep your 1989 Mercury Cougar in peak condition, inside and out.
Find Your Specific 1989 Mercury Cougar Performance Engines
Looking for the perfect Performance Engine for your 1989 Mercury Cougar? You’re in the right place. Below, you’ll find links to various types of Performance Engines that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Performance Engines, ensuring durability and a precise fit for your Mercury Cougar. Whether you’re driving a 1989 model or another popular model year like
1988,
1990,
1991,
1992,
1993,
1994,
1995,
1996, and
1997, we’ve got you covered. Purchasing Performance Engines 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 Performance Engines that fit your vehicle.
Essential 1989 Mercury Cougar Performance Engines
Mr. Gasket – High Performance Thermostat (Part No.4365)
from
$31.99
Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.
Product Features:
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Product Features:
- Opens At 195 Degrees
- Designed to Resist Large Variations of Coolant Pressure at High RPM
- Fully Opens at Correct Temperature Consistently Regardless of Engine RPM
- For High Performance Street, Drag Race, and Oval Track
- Copper & Brass Construction – Resists Corrosion
- High Flow
Mr. Gasket – High Performance 180 Degree Thermostat for Increased Flow (Part No.4364)
from
$29.99
Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.
Product Features:
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Product Features:
- Opens At 180 Degrees
- Designed to Resist Large Variations of Coolant Pressure at High RPM
- Fully Opens at Correct Temperature Consistently Regardless of Engine RPM
- For High Performance Street, Drag Race, and Oval Track
- Copper & Brass Construction – Resists Corrosion
- High Flow
Mr. Gasket – High Performance Thermostat – 160 Degree Brass & Copper (Part No.4363)
from
$29.49
Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.
Product Features:
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Product Features:
- Opens at 160 Degrees
- Designed to Resist Large Variations of Coolant Pressure at High RPM
- Fully opens at Correct Temperature Consistently Regardless of engine RPM
- For High Performance Street, Drag Race, and Oval Track
- Copper & Brass Construction – Resists Corrosion
- High Flow
Edelbrock – Performer Series Retainer (Qty 16) (Part No.9733)
from
$141.99
Product Features:
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- Use W/ Valve Springs Part #5722, 5796
- Set of 16
- 1.50 in. Outside Diameter
- Steel Material
- Black Oxide Finish
Edelbrock – Performer Series Retainer (Qty 16) (Part No.9724)
from
$106.99
Product Features:
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- Use W/ Valve Springs Part #5822, 5882, 5896, 5872, 5867, 5812, 5857
- Set of 16
- 1.50 in. Outside Diameter
- Steel Material
- Black Oxide Finish
Competition Cams – ROCKER ARMS, DIE CAST ALUM SMALL BLOCK FORD 1.6 1 ST (Part No.17043-16)
from
$249.99
The COMP Cams High Energy Die-Cast Aluminum Roller Rocker Arms are new rocker arms from the valve train leader that have been designed for street and moderate race use. They feature a die-cast body created from aluminum with a needle bearing fulcrum and roller tip. The die-cast, larger than stock body offers the strength properties and light weight of aluminum while the specially engineered fulcrum and roller tip decrease friction and lower oil temperatures, thus improving response and horsepower.
Product Features:
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Product Features:
- Cost effective aluminum construction provides superior strength to weight ratio
- Needle bearing fulcrum and roller tip reduce friction and lower oil temperatures for improved response and horsepower
- Durable design increases valve lift while withstanding the rigors of moderate race use
- Die-formed aluminum body is larger than stock, and may require modifications to stock valve covers for clearance.
Competition Cams – Magnum Roller 1.6 Ratio Rocker Arm Set (Part No.1431-16)
from
$350.99
These Magnum Roller Rocker Arms for Ford V8 289-351W (Rail Type) 1968-89 applications are the ultimate street rocker. With a 3/8″ stud diameter and 1.6 ratio, they are designed for serious performance enthusiasts. All Magnum Roller Rocker Arms are constructed from 8620 chromemoly steel, which is a superior material that will not flex and assures maximum lift. Their roller tip reduces friction, while stiff design and superior ratio accuracy yield more effective valve lift. With a 15 to 30 horsepower increase over other rocker arms, Magnum Roller Rockers are perfect for performance applications with less than 350 lbs. open spring pressure. Don’t accept inferior products or cheap knock-offs, look for the COMP Cams logo stamped into the underside of every Magnum Rocker.
Product Features:
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Product Features:
- Ultimate street rocker designed for serious performance enthusiasts
- Constructed from 8620 chromemoly steel, a superior material that will not flex and assures maximum lift
- Roller tip reduces friction while stiff design and superior ratio accuracy yields more effective valve lift
- 15 to 30 horsepower increase over stock rocker arms
- Use in any applications with less than 350 lbs. open spring pressure
Competition Cams – Rocker Arms,FS/FW 1.6 7/16 Ultra Pro Mag (Part No.1632-16)
from
$476.99
Rocker Arms,FS/FW 1.6 7/16 Ultra Pro Mag
Competition Cams – VALVE SPRING KIT, FOR LS 1.310" BEEHIVE 1 KT (Part No.26918CS-KIT)
from
$528.99
This Beehive Valve Spring Kit for LS engines is designed for hydraulic roller cams and includes carefully matched Beehive Springs, steel retainers, locks, seals and spring seats. With a .625″ maximum lift, these Beehive Valve Springs deliver increased valve train stability and a much lighter valve train. This is achieved with less spring pressure for better valve control and reduced weight of both the spring and retainer. The unique Beehive shape handles valve train stress more efficiently to eliminate damaging harmonics and increases high RPM horsepower and durability. The oval/multi-arc wire shape places the maximum area of the wire at the point of highest stress to handle valve train stress more efficiently and allow better heat dissipation for longer life.Kit Includes:26918-16 Beehive Valve Springs774-16 Steel Retainers623-16 7° Steel Valve Locks511-16 Valve Seals4705-16 Spring Seats
Product Features:
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Product Features:
- Kit includes part #26918-16 Beehive valve springs and matching steel retainers, 7° valve locks, valve seals and spring seats
- Kits designed for hydraulic roller cams
- .625″ maximum lift springs
Competition Cams – VALVE SPRINGS, 1.437" SINGLE 1 ST (Part No.942-16)
from
$257.99
Single Outer Valve Springs from COMP Cams allow you to build the perfect spring assembly for your application. The valve spring creation process is far more involved than most people realize. Selecting the right metal stock and creating the best design is not done by chance. COMP Cams has developed a process that creates the highest quality valve spring available. The result is a product that meets and exceeds the expectations of today’s engine builders and racers.
Product Features:
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Product Features:
- Seat pressure: 115 lbs. @ 1.700″, Open Pressure: 284 lbs. @ 1.200″
- O.D.: 1.437″, I.D.: 1.039″
- Single valve springs with damper
- Approximately .510″ max lift at recommended installed height
Edelbrock – Pushrod Set for Ford 351M/400 (Part No.9633)
from
$198.99
Product Features:
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- 9.5 in. Length
- 0.312 in. Diameter
- 4130 Chromoly Steel Material
- Black Oxide Finish
- Made In The USA
Edelbrock – Pushrod Set for Small Block Ford 289-302 (Part No.9632)
from
$221.99
Product Features:
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- Case-Hardened Tubing
- Surface Hardening
- Welded Ends
- 0.3125 in. Diameter
- Use with or without Hardened Steel Guideplates
Edelbrock – Pushrod Set for Ford 351W (Part No.9659)
from
$200.99
Edelbrock part #9659 Pushrods are designed for small-block Ford 351W V-8 engine applications. These one-piece pushrods are manufactured from high quality 4130 Chromoly steel tubing that has been surface hardened for maximum durability. They have precise f
Product Features:
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Product Features:
- 7.7 in. Length
- 0.312 in. Diameter
- 4130 Chromoly Steel Material
- Black Oxide Finish
- Made In The USA
Popular 1989 Mercury Cougar Performance Engines Categories
Most Popular Performance Engine Push Rods for 1989 Mercury Cougars
Enhance your 1989 Mercury Cougar with one of the 2 Performance Engine Push Rods we have in stock, starting at just $15.99.
Competition Cams – Magnum 7.150" Long, .080" Wall, 5/16" Diameter Pushrod Set (Part No.7635-16)
from
$225.99
Magnum 7.150" Long, .080" Wall, 5/16" Diameter Pushrod Set
Competition Cams – Magnum 7.150" Long, .080" Wall, 5/16" Diameter Pushrod (Part No.7635-1)
from
$15.99
Magnum 7.150" Long, .080" Wall, 5/16" Diameter Pushrod
Best-Selling 1989 Mercury Cougar Performance Engine Valve Springs
Upgrade your Cougar with one of our 3 best-selling Performance Engine Valve Springs, earning an average 4 stars rating across 15 reviews.
Competition Cams – VALVE SPRING KIT, FOR LS 1.310" BEEHIVE 1 KT (Part No.26918CS-KIT)
from
$528.99
This Beehive Valve Spring Kit for LS engines is designed for hydraulic roller cams and includes carefully matched Beehive Springs, steel retainers, locks, seals and spring seats. With a .625″ maximum lift, these Beehive Valve Springs deliver increased valve train stability and a much lighter valve train. This is achieved with less spring pressure for better valve control and reduced weight of both the spring and retainer. The unique Beehive shape handles valve train stress more efficiently to eliminate damaging harmonics and increases high RPM horsepower and durability. The oval/multi-arc wire shape places the maximum area of the wire at the point of highest stress to handle valve train stress more efficiently and allow better heat dissipation for longer life.Kit Includes:26918-16 Beehive Valve Springs774-16 Steel Retainers623-16 7° Steel Valve Locks511-16 Valve Seals4705-16 Spring Seats
Product Features:
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Product Features:
- Kit includes part #26918-16 Beehive valve springs and matching steel retainers, 7° valve locks, valve seals and spring seats
- Kits designed for hydraulic roller cams
- .625″ maximum lift springs
Competition Cams – 12 Springs (Part No.26918-12)
from
$199.99
12 Springs
Competition Cams – 1 Spring (Part No.26918-1)
from
$24.99
1 Spring
Top-Quality Performance Engine Valve Spring Retainer for 1989 Mercury Cougars
Choose a high-quality OEM or aftermarket Performance Engine Valve Spring Retainer for Mercury Cougars and enjoy top-notch performance from $10.99.
Competition Cams – Steel Retainer for Set of 16 (Part No.786-16)
from
$80.99
Steel Retainer for Set of 16
Competition Cams – Steel Retainer for Set of 12 Ford 3.8/4.2L with STock Valve Spring Diameter (Part No.786-12)
from
$61.99
Steel Retainer for Set of 12 Ford 3.8/4.2L with STock Valve Spring Diameter
Competition Cams – Steel Retainer for Ford 3.8/4.2L with STock Valve Spring Diameter (Part No.786-1)
from
$10.99
Steel Retainer for Ford 3.8/4.2L with STock Valve Spring Diameter
Top Picks for 1989 Mercury Cougar Performance Engine Coolant Thermostats
Invest in one of our 3 durable Performance Engine Coolant Thermostats for your 1989 Mercury, knowing you’re getting trusted brands and expert craftsmanship.
Mr. Gasket – High Performance 180 Degree Thermostat for Increased Flow (Part No.4364)
from
$29.99
Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.
Product Features:
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Product Features:
- Opens At 180 Degrees
- Designed to Resist Large Variations of Coolant Pressure at High RPM
- Fully Opens at Correct Temperature Consistently Regardless of Engine RPM
- For High Performance Street, Drag Race, and Oval Track
- Copper & Brass Construction – Resists Corrosion
- High Flow
Mr. Gasket – High Performance Thermostat – 160 Degree Brass & Copper (Part No.4363)
from
$29.49
Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.
Product Features:
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Product Features:
- Opens at 160 Degrees
- Designed to Resist Large Variations of Coolant Pressure at High RPM
- Fully opens at Correct Temperature Consistently Regardless of engine RPM
- For High Performance Street, Drag Race, and Oval Track
- Copper & Brass Construction – Resists Corrosion
- High Flow
Mr. Gasket – High Performance Thermostat (Part No.4365)
from
$31.99
Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.
Product Features:
See More
Product Features:
- Opens At 195 Degrees
- Designed to Resist Large Variations of Coolant Pressure at High RPM
- Fully Opens at Correct Temperature Consistently Regardless of Engine RPM
- For High Performance Street, Drag Race, and Oval Track
- Copper & Brass Construction – Resists Corrosion
- High Flow
Performance Engine Rocker Arms for 1989 Mercury Cougars
Make a smart move for your 1989 Mercury Cougar with products all priced from $50.99 to $407.99.
Competition Cams – ENGINE ROCKER ARM (Part No.1619-12)
from
$407.99
ENGINE ROCKER ARM
Competition Cams – ENGINE ROCKER ARM (Part No.1619-1)
from
$50.99
ENGINE ROCKER ARM
Top-Rated Performance Engine Brands For Your 1989 Mercury Cougar
When it comes to finding the perfect Performance Engine for your 1989 Mercury Cougar, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 2 trusted brands. We carry the most popular Performance Engine brands including Competition Cams, and more, all known for their exceptional customer ratings (average brand rating of 4.1 stars) and competitive prices, as low as $528.99. Purchasing a Performance Engine from us here at Advance Auto Parts is a smart move for both you and your 1989 Mercury Cougar, providing peace of mind with parts that meet or exceed OEM standards.
Popular Competition Cams 1989 Mercury Cougar Performance Engines
If you’re looking for a top-quality Performance Engine for your 1989 Mercury Cougar, Advance Auto Parts has exactly what you need with our selection of Competition Cams Performance Engines. We have 1 Competition Cams Performance Engines in stock for this fitment, all known for their durability and precision fit. With prices starting at just $528.99, you’ll find the perfect Performance Engine for your needs and budget. Competition Cams Performance Engines for the 1989 Mercury Cougar come highly rated, with over 15 customer reviews and an impressive average rating of 4.1 stars. Choosing a Competition Cams Performance Engine from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
from
$528.99
(15)
VALVE SPRING KIT, FOR LS 1.310" BEEHIVE 1 KT
“Part worked great. Very convenient.”
FAQs for 1989 Mercury Cougar Performance Engines
What are the best-selling Performance Engines for 1989 Mercury Cougars?
Out of 14 Performance Engines that fit 1989 Mercury Cougars, the following parts are the top sellers:
- High Performance Thermostat (22903641) – $31.99
- Steel Retainer for Set of 16 (50289538) – $80.99
- ENGINE ROCKER ARM (50272804) – $50.99
What’s the price range for 1989 Mercury Cougar Performance Engines?
The prices of Performance Engines for the 1989 Mercury Cougar range from $10.99 up to $528.99 for the most premium parts.
What is the average price of a Performance Engine for a 1989 Mercury Cougar?
The average price for Performance Engines for the 1989 Mercury Cougar is $123.88. Keep in mind the variety of part types within our Performance Engine category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Performance Engines for other Mercury Cougar model years?
What are the cheapest Performance Engines for my 1989 Mercury Cougar?
The cheapest 1989 Mercury Cougar Performance Engines we carry are:
- Steel Retainer for Ford 3.8/4.2L with STock Valve Spring Diameter (50289140) – $10.99
- Magnum 7.150" Long, .080" Wall, 5/16" Diameter Pushrod (50289260) – $15.99
- 1 Spring (50287858) – $24.99
- High Performance Thermostat – 160 Degree Brass & Copper (17360031) – $29.49
- High Performance 180 Degree Thermostat for Increased Flow (17360033) – $29.99
Does Advance Auto Parts sell Performance Engines for any other 1989 Mercury models?
Yes. We stock Performance Engines for 3 other popular 1989 Mercury models. Some of the most popular are 1989 Grand Marquis Performance Engines, 1989 Colony Park Performance Engines, 1989 Sable Performance Engines, and 1989 Topaz Performance Engines.
What are the top-rated Performance Engines that fit the 1989 Mercury Cougar?
Based on 94 reviews by customers, our 1989 Mercury Cougar Performance Engines have an average customer rating of 4 stars. These are the highest-rated categories of Performance Engines for the 1989 Mercury Cougar and their top-rated products:
- Performance Engine Coolant Thermostats
- High Performance 180 Degree Thermostat for Increased Flow (17360033) – $29.99
- High Performance Thermostat – 160 Degree Brass & Copper (17360031) – $29.49
- Performance Engine Valve Springs
- VALVE SPRING KIT, FOR LS 1.310" BEEHIVE 1 KT (10214913) – $528.99
What types of Performance Engines do you sell for my 1989 Mercury Cougar?
As of 11/2/25, these are some of the most in-demand types of Performance Engines for a 1989 Mercury Cougar:
Can I get help with 1989 Mercury Cougar Performance Engine orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mercury Performance Engines and more.
What is your return policy for Mercury Cougar Performance Engines?
Advance Auto Parts keeps returns simple. For new Mercury Cougar Performance Engines and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.