Valves & Valvetrain Parts
- COMP Cams®Endure-X™ Valve LifterEndure-X™ Valve Lifter by COMP Cams®. Endure-X Solid Roller Lifters from COMP Cams are engineered to withstand the demands of aggressive cam lobe designs and increased RPM ranges, and are not designed for street use. They feature a...Removable Link Bar - COMP Cams patented link bar assembly combines the benefits of a removable link bar with the safety of a captured link barEDM Oil Injection™ Technology - guarantees that the bearing assembly receives a constant fl ow of pressurized oil via a precision hole aimed directly at the needle bearings$55.95 - $793.95
- COMP Cams®Engine Link BarEngine Link Bar by COMP Cams®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for a...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$13.95
- COMP Cams®Hi-Tech™ Drag Race Valve SpringHi-Tech™ Drag Race Valve Spring by COMP Cams®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$41.95 - $670.95
- COMP Cams®Hi-Tech™ Push RodHi-Tech™ Push Rod by COMP Cams®. This high-grade product was designed with craftsmanship and key attention to detail and manufactured using leading-edge innovations by experienced and knowledgeable engineering staff. It ensures...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$14.11 - $324.95
- COMP Cams®Hi-Tech™ Rocker Arm StudHi-Tech™ Rocker Arm Stud by COMP Cams®. This high-grade product was designed with craftsmanship and key attention to detail and manufactured using leading-edge innovations by experienced and knowledgeable engineering staff. It ensures...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$12.95 - $129.95
- COMP Cams®High Energy™ Push RodHigh Energy™ Push Rod by COMP Cams®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$7.95 - $239.95
- COMP Cams®High Energy™ Rocker ArmHigh Energy™ Rocker Arm by COMP Cams®. This high-grade product was designed with craftsmanship and key attention to detail and manufactured using leading-edge innovations by experienced and knowledgeable engineering staff. It ensures...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$15.95 - $257.95
- COMP Cams®High Energy™ Valve LifterHigh Energy™ Valve Lifter by COMP Cams®. This high-grade product was designed with craftsmanship and key attention to detail and manufactured using leading-edge innovations by experienced and knowledgeable engineering staff. It...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$13.95 - $611.95
- COMP Cams®High Load Beehive™ Valve SpringHigh Load Beehive™ Valve Spring by COMP Cams®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$28.95 - $597.95
- COMP Cams®LifterLifter by COMP Cams®. Designed utilizing the latest technology, this product by COMP Cams features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or exceed...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$51.95 - $1,195.95
- COMP Cams®Magnum™ Push RodMagnum™ Push Rod by COMP Cams®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$14.95 - $181.95
- COMP Cams®Magnum™ Rocker ArmMagnum™ Rocker Arm by COMP Cams®. This high-grade product was designed with craftsmanship and key attention to detail and manufactured using leading-edge innovations by experienced and knowledgeable engineering staff. It ensures...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$19.95 - $581.95
- COMP Cams®Performance Series™ Valve LifterPerformance Series™ Valve Lifter by COMP Cams®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$15.95 - $288.95
- COMP Cams®Pro Magnum™ Valve LifterPro Magnum™ Valve Lifter by COMP Cams®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$14.95 - $150.95
- COMP Cams®Push Rod Guide PlatePush Rod Guide Plate by COMP Cams®. This high-grade product was designed with craftsmanship and key attention to detail and manufactured using leading-edge innovations by experienced and knowledgeable engineering staff. It ensures...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$7.95 - $76.95
- COMP Cams®Race Valve SpringRace Valve Spring by COMP Cams®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$34.95 - $544.95
- COMP Cams®Race Valve Spring Retainer KeeperRace Valve Spring Retainer Keeper by COMP Cams®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$5.95 - $237.95
- COMP Cams®Rocker ArmRocker Arm by COMP Cams®. The original Ultra-Gold™ Aluminum Rockers changed the way racing and high performance street engine builders approached valve train design. Now, COMP Cams is revolutionizing valve train performance again with...Next gen Rockers increase engine power, enhance valve train stability & improve oilingNew extrusion based on improvements developed through FEA analysis, resulting in an even stronger, stiffer body without compromising mass$41.95 - $2,014.95
- COMP Cams®Rocker Arm BushingRocker Arm Bushing by COMP Cams®. This high-grade product was designed with craftsmanship and key attention to detail and manufactured using leading-edge innovations by experienced and knowledgeable engineering staff. It ensures...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$8.95 - $211.95
- COMP Cams®Rocker Arm PivotRocker Arm Pivot by COMP Cams®. This high-grade product was designed with craftsmanship and key attention to detail and manufactured using leading-edge innovations by experienced and knowledgeable engineering staff. It ensures...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$175.95
- COMP Cams®Rocker Shaft Adjusting KitRocker Shaft Adjusting Kit by COMP Cams®. This high-grade product was designed with craftsmanship and key attention to detail and manufactured using leading-edge innovations by experienced and knowledgeable engineering staff. It ensures...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$165.95
- COMP Cams®Roller Lifter Installation KitRoller Lifter Installation Kit by COMP Cams®. Designed utilizing the latest technology, this product by COMP Cams features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$62.95 - $158.95
- COMP Cams®Street Valve Spring Retainer LockStreet Valve Spring Retainer Lock by COMP Cams®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$5.95 - $21.95
- COMP Cams®Street/Strip Valve SpringStreet/Strip Valve Spring by COMP Cams®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$29.95 - $363.95
- COMP Cams®Super Lock™ Valve LocksSuper Lock™ Valve Locks by COMP Cams®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$5.95 - $237.95
- COMP Cams®Super Lock™ Valve Spring Retainer KeeperSuper Lock™ Valve Spring Retainer Keeper by COMP Cams®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$6.95 - $292.95
- COMP Cams®Ultra Pro Magnum™ XD Rocker ArmUltra Pro Magnum™ XD Rocker Arm by COMP Cams®. This high-grade product was designed with craftsmanship and key attention to detail and manufactured using leading-edge innovations by experienced and knowledgeable engineering staff. It...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$52.95 - $686.95
- COMP Cams®Ultra-Gold ARC Series Rocker ArmUltra-Gold ARC Series Rocker Arm by COMP Cams®. This high-grade product was designed with craftsmanship and key attention to detail and manufactured using leading-edge innovations by experienced and knowledgeable engineering staff. It...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$39.95 - $412.95
- COMP Cams®Ultra-Gold Rocker ArmUltra-Gold Rocker Arm by COMP Cams®. This high-grade product was designed with craftsmanship and key attention to detail and manufactured using leading-edge innovations by experienced and knowledgeable engineering staff. It ensures...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$47.95 - $655.95
- COMP Cams®Valve Lash CapValve Lash Cap by COMP Cams®. This high-grade product was designed with craftsmanship and key attention to detail and manufactured using leading-edge innovations by experienced and knowledgeable engineering staff. It ensures trustworthy...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$7.95 - $50.95
Valves allow gases to flow in and out of the cylinders, and seal the combustion chambers so compression can develop. They open and close in response to the lobes on the camshaft via the valvetrain. The air/fuel mixture flows in when the intake valve opens, and the spent exhaust gases flow out when the exhaust valve opens after the power stroke. Every engine has at least one intake and exhaust valve, while many have a pair of each.
Valvetrains differ according to camshaft location. On Over Head Valve engines the cam is in the cylinder block. On Over Head Cam engines one or two cams are on the cylinder head. On OHV engines lifters ride on the camshaft lobes, pushrods transfer motion up to the cylinder head, and rocker arms pivot on shafts or studs actuating the valves. OHC valvetrains may have pivoting rocker type followers and lash adjusters or buckets between the cam and valves.
Valvetrain problems are often caused by excessive clearance. As cam lobes, lifters/followers, pushrods, and rocker arms wear, clearance is increased. Once clearance starts to increase, the pounding experienced by each component becomes greater as the lash opens and is taken up during valve operation. This can result in bent pushrods and broken rocker arms. The most common valve failure is overheating, especially on exhaust valves, which causes the valve to “burn” and distort and/or crack.
Miles and engine heat can also take their toll on valve springs. The valve springs must have enough pressure to keep the valves closed and maintain valve lash. Seat pressure is usually 70-90 lbs. on a stock engine with open pressure at 200 lbs. or more. Weak valve springs can’t exert the proper amount of pressure, which can cause misfire and loss of power as engine speed increases, resulting in “valve float”, where the valves fail to close. In extreme cases valve float can allow the valves to contact the pistons on some engines, bending or breaking the valves and cracking or breaking the pistons.
Performance valvetrain components must be much stronger to function at high RPMs and overcome stiff valve spring pressure to open larger valves. Higher valve spring pressure is needed to prevent valve float at high RPM. Performance rocker arms and valve spring retainers are made of lighter materials to enable the engine to rev easier and achieve higher RPM, and components like roller lifters and roller rockers reduce power-robbing friction. Most performance pushrods are made of strong chrome moly steel, and larger diameter pushrods are available for some applications. No matter whether you’re looking for a stock replacement or a performance unit, we are your one-stop shop.
Browse by Part Name
Featured Brands
Related Categories
- Engine Assemblies
- Motor Mounts
- Engine Blocks
- Pistons, Rings & Connecting Rods
- Oil Filters
- Serpentine Belts & Auxiliary Drive Belts
- Valve Covers
- Timing Gears, Chains & Covers
- Engine Oil Pans, Drain Plugs & Dipsticks
- Cylinder Heads
- Timing Belts
- Engine Pulleys
- Engine Sensors, Relays, Switches & Connectors
- Oil Pumps
- Drive Belt Tensioners
- Oil Coolers
- Camshafts
- Crankshafts
- Engine Management Systems
- Engine Bearings
- Harmonic Balancers
- Engine Rebuild Kits
- Oil Catch Cans
- Balance Shafts
- Engine Swap Kits
- Engine Wiring Harnesses
- Intercoolers
- Throttle Bodies
- Carburetors
- Motor Oils