Valves & Valvetrain Parts
![Valves & Valvetrain Parts](https://ic.carid.com/pages/replacement-valves-valvetrain-parts/valves-valvetrain-parts_collage_0.jpg)
- Melling®Rocker Arm Kit (MRK-405)Rocker Arm Kit (MRK-405) by Melling®. Melling lists rocker arms for both domestic and import applications. Depending on OEM design specifications, Melling rocker arms are provided in either stamped or cast materials. Each rocker arm is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$11.26
- Melling®Rocker Arm Kit (MRK-407)Rocker Arm Kit (MRK-407) by Melling®. Melling lists rocker arms for both domestic and import applications. Depending on OEM design specifications, Melling rocker arms are provided in either stamped or cast materials. Each rocker arm is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$9.79
- Melling®Rocker Arm Kit (MRK-547)Rocker Arm Kit (MRK-547) by Melling®. Melling lists rocker arms for both domestic and import applications. Depending on OEM design specifications, Melling rocker arms are provided in either stamped or cast materials. Each rocker arm is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$11.59
- Melling®Rocker Arm Kit (MRK-401)Rocker Arm Kit (MRK-401) by Melling®. Melling lists rocker arms for both domestic and import applications. Depending on OEM design specifications, Melling rocker arms are provided in either stamped or cast materials. Each rocker arm is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$8.57
- ITM Engine®Exhaust Rocker Arm (056-6009)Exhaust Rocker Arm (056-6009) by ITM Engine®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Designed with innovative manufacturing techniquesMade with maximum safety and reliability in mind$12.89
- ITM Engine®Intake Rocker Arm (056-6024)Intake Rocker Arm (056-6024) by ITM Engine®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Designed with innovative manufacturing techniquesMade with maximum safety and reliability in mind$13.48
- ITM Engine®Intake Rocker Arm (056-6083)Intake Rocker Arm by ITM Engine®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Designed with innovative manufacturing techniquesMade with maximum safety and reliability in mind$24.27
- ITM Engine®Rocker Arm (056-6116)Rocker Arm (056-6116) by ITM Engine®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Designed with innovative manufacturing techniquesMade with maximum safety and reliability in mind$18.00
- ITM Engine®Rocker Arm (056-6006)Rocker Arm by ITM Engine®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials...Designed with innovative manufacturing techniquesMade with maximum safety and reliability in mind$11.82
- ITM Engine®Rocker Arm (056-6001)Rocker Arm (056-6001) by ITM Engine®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Designed with innovative manufacturing techniquesMade with maximum safety and reliability in mind$24.01
- ITM Engine®Rocker Arm (056-6007)Rocker Arm (056-6007) by ITM Engine®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Designed with innovative manufacturing techniquesMade with maximum safety and reliability in mind$10.63
- ITM Engine®Rocker Arm (056-6027)Rocker Arm by ITM Engine®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials...Designed with innovative manufacturing techniquesMade with maximum safety and reliability in mind$14.06
- ITM Engine®Rocker Arm (056-6032)Rocker Arm (056-6032) by ITM Engine®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Designed with innovative manufacturing techniquesMade with maximum safety and reliability in mind$14.07
- ITM Engine®Rocker Arm (056-6031)Rocker Arm (056-6031) by ITM Engine®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Designed with innovative manufacturing techniquesMade with maximum safety and reliability in mind$12.36
- ITM Engine®Rocker Arm (056-6153)Rocker Arm (056-6153) by ITM Engine®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Designed with innovative manufacturing techniquesMade with maximum safety and reliability in mind$28.75
- ITM Engine®Rocker Arm (056-6038)Rocker Arm by ITM Engine®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials...Designed with innovative manufacturing techniquesMade with maximum safety and reliability in mind$13.91
- DNJ Engine Components®Intake Front Rocker Arm (IRA607)Intake Front Rocker Arm (IRA607) by DNJ Engine Components®. 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...Designed to replace your malfunctioning partsHelps get your vehicle back to it's original performance$31.34
- DNJ Engine Components®Intake Rear Rocker Arm (IRA607A)Intake Rear Rocker Arm (IRA607A) by DNJ Engine Components®. 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...Designed to replace your malfunctioning partsHelps get your vehicle back to it's original performance$31.34
- Pioneer Automotive®Cast Iron Rocker Arm Kit (RK-660-B)Cast Iron Rocker Arm Kit (RK-660-B) by Pioneer Automotive®. For 5/16" and 3/8" Stud. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will perform better than advertised. Perfect...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$19.31
- Pioneer Automotive®Passenger Side Rocker Arm Kit (RK-411-B)Passenger Side Rocker Arm Kit (RK-411-B) by Pioneer Automotive®. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will perform better than advertised. Perfect for your vehicle and...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$9.95
- Pioneer Automotive®Rocker Arm Kit (RK-550-B)Rocker Arm Kit (RK-550-B) by Pioneer Automotive®. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$15.29
- Pioneer Automotive®Rocker Arm Kit (RK-405-X)Rocker Arm Kit (RK-405-X) by Pioneer Automotive®. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$23.64
- Pioneer Automotive®Rocker Arm Kit (RK-374-B)Rocker Arm Kit (RK-374-B) by Pioneer Automotive®. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$16.05
- Pioneer Automotive®Rocker Arm Kit (818002)Rocker Arm Kit (818002) by Pioneer Automotive®. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$38.44
- Pioneer Automotive®Stamped Steel Rocker Arm Kit (RK-888-B)Stamped Steel Rocker Arm Kit (RK-888-B) by Pioneer Automotive®. With Fulcrum. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will perform better than advertised. Perfect for...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$13.19
- COMP Cams®High Energy™ Pedestal Mount Rocker Arm Set (1235-16)High Energy™ Pedestal Mount Rocker Arm Set (1235-16) 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...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$210.95
- COMP Cams®High Energy™ Stud Mount Die Cast Roller Rocker Arm Set (17045-16)High Energy™ Stud Mount Die Cast Roller Rocker Arm Set (17045-16) 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...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$257.95
- COMP Cams®Magnum™ Stud Mount Roller Rocker Arm Set (1452-16)Magnum™ Stud Mount Roller Rocker Arm Set (1452-16) by COMP Cams®. These Magnum Roller Rocker Arms for Chevy V8 265-400 and V6 200-262 applications are the ultimate street rocker. With a 3/8" stud diameter and 1.52 ratio, they are...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$206.95
- COMP Cams®Magnum™ Stud Mount Roller Rocker Arm Set (1451-16)Magnum™ Stud Mount Roller Rocker Arm Set (1451-16) by COMP Cams®. These Magnum Roller Rocker Arms for Chevy V8 265-400 and V6 200-262 applications are the ultimate street rocker. With a 3/8" stud diameter and 1.52 ratio, they are...Developed to provide steady performance and reliabilityMade using up-to-date equipment and new technologies$206.95
- COMP Cams®Rocker Arm with Trunnion Upgrad (1477-16)Rocker Arm with Trunnion Upgrad by COMP Cams®. The original Aluminum Rockers changed the way racing and high performance street engine builders approached valve train design. Now, COMP Cams is revolutionizing valve train performance...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$536.95
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