Valves & Valvetrain Parts
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- Mopar®Rocker ArmRocker Arm by Mopar®. Want your prized possession to look and perform the way it was designed to? Then top-of-the-line Mopar automotive parts and accessories are for you. Made using the latest manufacturing technology to meet the...Ideal solution to keep your vehicle in top shapeCrafted from premium-grade materials and the latest technology$2.28 - $771.23
- Enginetech®Rocker ArmRocker Arm by Enginetech®. The Engine Builder's Source, can locate the right part for nearly any rebuild application. Offering a full line of internal engine parts for domestic, import and high performance applications, Enginetech...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$3.19 - $143.25
- COMP Cams®Ultra Pro Magnum™ Rocker ArmUltra Pro Magnum™ Rocker Arm 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...Investment cast 8650 chromemoly body and arched, web-like design deliver increased strength and rigidity while still reducing the moment of inertia. Unique black oxide exterior finish helps prevent corrosion and increases durability.Optimized retainer and valve spring clearances allow for use of most diameter springs, retainers and +.050" locks without clearance or fitment issues.$42.95 - $777.95
- Genuine®Rocker ArmRocker Arm by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from premium materials using state-of-the-art...Made with precision and quality in mindDesigned to meet your specific needs$22.84 - $829.98
- Sealed Power®Rocker ArmRocker Arm by Sealed Power®. Designed utilizing the latest technology, this product by Sealed Power features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or...Direct replacementManufactured to strict engineering quality standards$7.10 - $13.66
- SKP®Engine Valve Cover GasketEngine Valve Cover Gasket by SKP®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great quality...Precise engineering ensures second to none quality and lasting valueStringently tested with the highest quality standards$5.28 - $320.13
- Original Equipment®Rocker ArmRocker Arm by Original Equipment®. Looking for high-quality replacement parts to restore the performance of your vehicle? Then Original Equipment automotive parts are for you. They are manufactured from the finest materials according to...Perfect replacement for your damaged or worn out original partMade using high-grade materials for long-lasting dependability$106.59 - $190.14
- ITM Engine®Rocker ArmRocker 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$6.57 - $52.79
- DNJ Engine Components®Rocker ArmRocker Arm 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 provide a perfect fit...Designed to replace your malfunctioning partsHelps get your vehicle back to it's original performance$8.82 - $31.34
- Pioneer Automotive®Engine Rocker Arm KitEngine Rocker Arm Kit 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$7.05 - $70.02
- 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®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®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®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
- Febi®Rocker ArmRocker Arm by Febi®. 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 using...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$10.13 - $107.89
- CRP®Engine Rocker ArmEngine Rocker Arm by CRP®. 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 to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$48.72 - $67.88
- Crown®Engine Rocker ArmEngine Rocker Arm by Crown®. Crown Automotive is just the ticket if you want to get the most out of your vehicle as well as revel in a more exciting driving experience. You will surely get a real bang for the buck!Developed to improve your driving experienceConstructed to ensure ultimate operation$22.46 - $167.39
- QualCast®Rocker ArmRocker Arm by QualCast®. 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 hassle...Made from high-strength materials for uncompromising durabilityDesigned to provide an excellent combination of price and quality$6.66 - $12.60
- DIY Solutions®Engine Rocker ArmEngine Rocker Arm by DIY Solutions®. If you're seeking to get your steel stallion back to its tip-top condition, then this top-notch replacement solution is what you should definitely look out for. When it comes to quality, reliability...Designed to help restore your vehicle to its former gloryQuick replacement to let you enjoy an awesome ride again$28.51 - $638.51$38.71 - $679.27Save up to 9%
- Eurospare®Rocker ArmRocker Arm by Eurospare®. 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 to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$8.63 - $11.43
- AJUSA®Rocker ArmRocker Arm by AJUSA®. One the most critical components of any engine is the head gasket — which seals the cylinder head to the engine block. AJUSA offers excellent coverage for European and Asian vehicles in the U.S. and Canadian...Direct OEM replacement for a proper fitEnsure reliable sealing performance$42.34 - $112.73
- Omix-ADA®Rocker ArmsRocker Arms by Omix-ADA®. Designed utilizing the latest technology, this product by Omix-ADA features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or exceed...Made with precision and quality in mindDesigned to meet your specific needs$10.65 - $117.26
- Crane Cams®OEM-Style Stud Mount Rocker ArmOEM-Style Stud Mount Rocker Arm by Crane Cams®. High-performance engine builders and street tuners who crave for maximum performance out of their vehicle, choose these top-grade performance products painstakingly designed by Crane Cams....Designed to unlock more performance out of your vehicleBump up engine power to the next level$5.74 - $121.69
- Crane Cams®Steel and Ductile Iron Rocker ArmSteel and Ductile Iron Rocker Arm by Crane Cams®. High-performance engine builders and street tuners who crave for maximum performance out of their vehicle, choose these top-grade performance products painstakingly designed by Crane...Designed to unlock more performance out of your vehicleBump up engine power to the next level$7.60 - $8.54
- Elgin®Rocker ArmsRocker Arms by Elgin®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great quality at an...Stamped steel design for high-performanceSuperior heat treat$8.04 - $18.35
- INA®Rocker ArmRocker Arm by INA®. The INA is a leading automotive and industrial supplier worldwide. The Company stands for the highest quality, outstanding technology and distinctive innovative ability. The way to convince customers in the long term...Made from sturdy materialsGreat design and function$7.28 - $12.00
- Kolbenschmidt®Rocker ArmRocker Arm by Kolbenschmidt®. Manufactured with customers in mind using most modern methods and leading-edge equipment, this premium-grade product is excellent in every detail. It ensures impeccable quality and maximum reliability and...Unique craftsmanship paired with advanced technologyDesigned to ensure a high level of reliability and security$15.68 - $249.36
- PRW®PQX 2024 Extruded Rocker ArmPQX 2024 Extruded Rocker Arm by PRW®. Designed utilizing the latest technology, this product by PRW features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or...Made with precision and quality in mindDesigned to meet your specific needs$289.87 - $305.87
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.
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