Engines & Engine Parts

Welcome to your headquarters for horsepower—the place to get everything you need to build real power and performance! We’ve got competition-proven crate engines, performance-matched...

Welcome to your headquarters for horsepower—the place to get everything you need to build real power and performance! We’ve got competition-proven crate engines, performance-matched top end kits, and complete rotating assemblies from the biggest names in the industry. You can add a set of high-flow cylinder heads to your powerplant, upgrade your valvetrain, improve your oiling system, or drop in a new set of pistons. We also have a complete selection of crankshafts, connecting rods, harmonic balancers, pulleys, and engine brackets. We even have everything you need to restore the horsepower that time has stolen from your...

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COMP Cams Thumpr Hydraulic Flat Tappet Cam and Lifter Kits

COMP Cams is bringing the muscle car sound back, and it's nastier than ever! Let's face it--few things serve to grab our attention at a car show or cruise night more than a car with a thumping, high performance idle. In an ongoing quest to provide you with the performance and sound you demand, COMP Cams engineering team proudly introduces the Thumpr Series cam and lifter kits. The lobe profile and grind characteristics of these Thumpr camshafts use a combination of an early exhaust valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap to maximize the rough-idling characteristics of the cams. This gives you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. Thumpr camshafts are available in different grind profiles; each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range. Thumpr Series cam and lifter kits deliver a substantial power increase over an identical hydraulic flat tappet grind without sacrificing reliability or ease of maintenance.

4.38 out of 5 stars ( 225 )

$397.99

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$489.95

COMP Cams Xtreme Energy Retrofit Cam and Lifter Kits

COMP Cams Xtreme Energy retrofit cam and lifter kits are built to take advantage of the latest cam technology, to provide maximum performance. Whether your use is off-roading, towing, or street performance, there is an Xtreme Energy kit available for you. By using an aggressive lobe profile, these kits provide better throttle response and more top-end horsepower than equivalent cams from other manufacturers, while delivering increased engine vacuum.

4.34 out of 5 stars ( 41 )

$1,210.95

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$1,624.95

COMP Cams Thumpr Hydraulic Roller Cam and Lifter Kits

COMP Cams is bringing the musclecar sound back, and it's nastier than ever! Few things serve to grab our attention at a car show or cruise night more than a car with a thumping, high performance idle. In an ongoing quest to provide you with the performance and sound that you demand, COMP Cams' engineering team proudly introduces the Thumpr Series hydraulic roller cam and lifter kits. They are designed for use in engines that were originally equipped with flat tappet camshafts. The lobe profile and grind characteristics of these Thumpr camshafts use a combination of an early exhaust valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap. They're designed to maximize the rough-idling characteristics of the cams, giving you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. They are available in three different grind profiles. Each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range. Thumpr Series cam and lifter kits feature a cutting-edge hydraulic roller design that delivers a substantial power increase over an identical hydraulic flat tappet grind without sacrificing reliability or ease of maintenance.

4.27 out of 5 stars ( 15 )

$1,210.95

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$1,833.95

COMP Cams Xtreme Marine Cam and Lifter Kits

COMP Cams Xtreme marine cam and lifter kits take advantage of the newest developments in camshaft design. Their aggressive lobe design produces better throttle response and top-end horsepower than other systems with the same duration at .050 in., while delivering increased engine vacuum. These kits are available for everything from pleasure boats to race applications, so you can always have Xtreme performance on the water.

3.95 out of 5 stars ( 20 )

$386.99

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$1,624.95

COMP Cams Magnum Hydraulic Cam and Lifter Kits

Designed for hot street/strip cars, COMP Cams Magnum Series cam and lifter kits require a higher compression ratio, rear-end gear ratio, and stall torque converter than stock. With a very aggressive profile, these Magnum hydraulic cam and lifter kits provide maximum top-end performance for your high performance car.

4.38 out of 5 stars ( 143 )

$381.95

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$737.95

COMP Cams Xtreme Energy Cam and Lifter Kits

COMP Cams Xtreme Energy cam and lifter kits are built to take advantage of the latest cam technology and provide maximum performance. Whether your use is off-roading, towing, or street performance, there are Xtreme Energy options available for you. By using an aggressive lobe profile, they provide better throttle response and more top-end horsepower than equivalent kits from other manufacturers, while delivering increased engine vacuum. Order the model designed for your vehicle and engine application.

4.27 out of 5 stars ( 405 )

$381.95

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$1,624.99

COMP Cams Xtreme Energy 4x4 Cam and Lifter Kits

COMP Cams Xtreme Energy 4x4 cam and lifter kits are built to take advantage of the latest cam technology to provide maximum performance and low-end torque for your vehicle. Whether your use is off-roading or towing, there is an Xtreme 4x4 for you. By using an aggressive lobe profile, these cams provide better throttle response and more top-end horsepower than equivalent cams from other manufacturers, while delivering increased engine vacuum.

4.37 out of 5 stars ( 70 )

$382.95

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$643.99

COMP Cams Big Mutha Thumpr Hydraulic Flat Tappet Cam and Lifter Kits

A car with thumping, high performance idle is sure to grab your attention. COMP Cams is bringing the muscle car sound back, and it's nastier than ever with their Big Mutha' Thumpr hydraulic flat tappet cam and lifter kits. With the meanest sound in the Thumpr line, Big Mutha' street/strip kits produce a very rough idle. And you can rest assured that the aggressive muscle car attitude of your Thumpr-equipped car will be backed up by proven horsepower performance. The kts include camshaft, a set of matched lifters, assembly lube, decals, and instructions.

4.75 out of 5 stars ( 16 )

$397.99

COMP Cams Thumpr Retrofit Hydraulic Roller Cam and Lifter Kits

Musclecar sound is back and nastier than ever with these Thumpr retrofit hydraulic roller cam and lifter kits from COMP Cams! These cams feature a thumping high performance idle and provide significant horsepower and torque increases. Specially engineered profiles are offered for each unique engine, providing the perfect combination of an early intake valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap to maximize your engine's nasty-idling characteristics without negatively impacting streetability. These kits include high-quality matched lifters for unbeatable performance, durability, and ease of installation.

4.57 out of 5 stars ( 23 )

$1,210.99

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$1,833.99

COMP Cams High Energy Cam and Lifter Kits

Increase your street machine's gas mileage and powerband performance! COMP Cams High Energy cam and lifter kits are designed for street engines with an 8:1 to 9:1 compression ratio. They also work well with all stock components, including intakes, exhaust manifolds, and carburetors. These kits offer good increases in both gas mileage and power throughout the rpm range for most street applications.

4.23 out of 5 stars ( 194 )

$367.95

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$548.99

COMP Cams Magnum Retrofit Cam and Lifter Kits

COMP Cams Magnum retrofit cam and lifter kits are designed for everyone from the serious street performance enthusiast to the all-out competition drag racer. Whether you're driving a street rod, a show car with power accessories, a super gas, or super competition car on alcohol, COMP Cams kits will fit your engine's needs.

4.57 out of 5 stars ( 7 )

$1,210.95

COMP Cams Xtreme 4x4 Cam and Lifter Kits

These COMP Cams Xtreme 4x4 cam and lifter kits are built to take advantage of the latest cam technology to provide maximum performance and torque for your vehicle. Whether your use is off-roading or towing, there is an Xtreme 4x4 kit for you. By using an aggressive lobe profile, these cams provide better throttle response and more mid and top-end horsepower.

4.5 out of 5 stars ( 14 )

$346.99

COMP Cams Magnum Solid Roller Cam and Lifter Kits

COMP Cams Magnum solid roller cam and lifter kits are designed for everyone from the serious street performance enthusiast to the all-out competition drag racer. Whether you're driving a street rod, show car with power accessories, a super gas, or a super competition car on alcohol, one of these kits will fit your engine's needs .

3.67 out of 5 stars ( 3 )

$1,210.95

COMP Cams Xtreme Marine Retrofit Cam and Lifter Kits

Give your boat an Xtreme setup! COMP Cams Xtreme marine retrofit cam and lifter kits are designed to take advantage of the newest developments in camshaft design and to provide maximum performance. Their aggressive lobe design produces better throttle response and top-end horsepower than other systems with the same duration at .050 in., while delivering increased engine vacuum. These kits are available for everything from pleasure boats to race applications, so you can always have Xtreme performance on the water.

Not Yet Reviewed

$1,624.95

COMP Cams Nitrous HP Cam and Lifter Kits

COMP Cams Nitrous HP cam and lifter kits are designed to work with your nitrous system to get more power from your engine. The unique intake cam lobes allow your engine cylinders to fill better for more complete combustion. While, the exhaust lobes are spread to decrease overlap and ensure maximum scavenging of your combustion chamber. The bottom line is an increased power boost from your nitrous system, without any loss of throttle response or torque in street applications.

4.0 out of 5 stars ( 6 )

$397.95

Namura Technologies Top-End Repair Kits

Top-end rebuilds can help to improve the performance of your ride, and Namura Technologies top-end repair kits will keep your ATV, UTV, or off-road motorcycle running in peak condition! They include everything you need: pistons, top-end gasket kit, and wrist pin bearings (where applicable) in one convenient, time-saving package. Namura kits are available for a wide variety of makes and models, with specific bore and compression ratio parts to service your specific vehicle. Choose to do your rebuild with repair kits from Namura Technologies—the people who make pistons with attitude!

5.0 out of 5 stars ( 2 )

$93.99

Clearance

ATS Diesel Performance Valve Spring Kits

ATS Diesel Performance valve spring kits feature a conical design that provides more valve control than a standard straight spring. The conical shape allows for a smaller and lighter spring retainer that is also stronger due to size reduction. Unlike other valve springs on the market, ATS valve spring kits can be used on a wide range of trucks, from stock all the way up to competition builds making 2,000 horsepower. Each spring is computer load mapped and matched within 1 lb. of seat pressure followed by a stress relief process to ensure quality and long-term reliability. For a one-and-done upgrade that will allow you to modify your engine to support more power down the road, the smart choice is ATS Diesel Performance valve spring kits.

Not Yet Reviewed

$522.50

$396.50

COMP Cams Valve Springs

Valve springs are one of the most critical and overlooked components in your engine. They must be matched to your cam in order for the engine to reach its full potential. It does absolutely no good to install a cam that will perform up to 8,000 rpm if you do not have the correct springs. Use the only valve springs that will give the recommended spring pressure with the valve both on the seat and at maximum lift. COMP Cams valve springs are offered in single and dual styles to meet your cam requirements.

4.67 out of 5 stars ( 203 )

$865.95

Melling Engine Valve Spring Kits

Whether you are freshening up an OEM valvetrain or building for street/strip, drag race, or circle track competition, Melling engine valve spring kits deliver the performance, durability, and application coverage serious engine builders demand. Melling offers kits for standard, mid-range, heavy-duty, and race-ready combinations in a range of wire diameters, materials, and spring pressures to match the needs of your engine. Available configurations include standard and dual springs, with or without dampers, plus modern beehive designs for select applications. When included (check part number specifications), high-performance locks, retainers, seals, and shims are engineered to work together for proper fit, improved durability, and dependable valvetrain control. High-tension spring rates help support increased valve lift and aggressive camshaft profiles, maintaining stability at elevated rpm to reduce the risk of valve float. Built from premium alloys and heat-treated for added strength and fatigue resistance, these kits are a solid choice for demanding performance builds. From stock replacement to race-day readiness, Melling has a kit designed to fit your combination and keep your valvetrain under control when it matters most. Lock in the right spring pressure and let your engine pull harder all the way to the finish line with the Melling engine valve spring kits designed to fit your application!

Not Yet Reviewed

$206.99

Edelbrock Valve Spring Retainers

Edelbrock's valve spring retainers are made of superior-quality steel, and are machined and heat-treated for strength. They have a black oxide finish for rust and corrosion protection. And when matched with Edelbrock's valve stem lock kits and valve springs, Edelbrock valve spring retainers will give you the reliable valvetrain performance you need for your street rod, daily driver, or competition vehicle.

4.56 out of 5 stars ( 9 )

$106.99

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$110.99

COMP Cams LST Series Hydraulic Roller Camshafts

COMP Cams LST Series hydraulic roller camshafts deliver "Low Shock Technology." These LST camshafts feature lobe profiles designed to maximize horsepower, while improving stability at higher rpm. They're also easier on the valve springs, enhancing durability and reducing load loss. From street durability to track power, COMP Cams LST Series hydraulic roller camshafts are an awesome choice for your build. The cams are available for a variety of engine, piston, and engine applications.

Not Yet Reviewed

$920.95

Fluidampr Harmonic Dampers

Using only three parts (a laser-welded sealed housing, an internal inertia ring, and highly viscous silicone fluid between the two), SFI-approved Fluidampr harmonic dampers can control all crankshaft vibration--not just a limited frequency range. As a result, you get reduced wear on the main bearings and timing gear, more stable valvetrain operation, and less chance of crank failure.

4.77 out of 5 stars ( 151 )

$574.99

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