Valves & Valvetrain Parts
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- Eurospare®Passenger Side Intake Rocker Arm (602153)Passenger Side Intake Rocker Arm (602153) 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$8.66
- Eurospare®Passenger Side Rocker Arm (602153AL)Passenger Side Rocker Arm (602153AL) 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$8.63
- Omix-ADA®1st Design Rocker Arm (17408.06)1st Design Rocker Arm 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...Made with precision and quality in mindDesigned to meet your specific needs$10.65
- Omix-ADA®Rocker Arm Kit (17408.15)Rocker Arm Kit 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...Made with precision and quality in mindDesigned to meet your specific needs$117.26
- Crane Cams®OEM-Style Stud Mount Rocker Arm (11801-1)OEM-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
- Crane Cams®OEM-Style Stud Mount Rocker Arms (11802-16)OEM-Style Stud Mount Rocker Arms (11802-16) 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...Designed to unlock more performance out of your vehicleBump up engine power to the next level$121.69
- Ford Performance®Rocker Arm & Lash Adjuster Kit (M-6529-3V)Rocker Arm & Lash Adjuster Kit by Ford Performance®. 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...Built with all NEW PartsDesigned to help you get the most out of your vehicle$450.11
- Ford Performance®Roller Finger Follower Kit (M-6564-M50)Roller Finger Follower Kit by Ford Performance®. Designed utilizing the latest technology, this product by Ford Performance 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$216.01
- INA®Rocker Arm (4220059100)Rocker Arm (4220059100) by INA®. 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...Made from sturdy materialsGreat design and function$11.60
- PRW®PQX 2024 Extruded Billet™ Rocker Arm (0528901)PQX 2024 Extruded Billet™ Rocker Arm (0528901) 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...Made with precision and quality in mindDesigned to meet your specific needs$289.87
- PRW®PQ™ Shaft Mount Rocker System Complete Kit (3244011)PQ™ Shaft Mount Rocker System Complete Kit (3244011) by PRW®. Performance Quotient Series Rocker Arm Systems are engineered to maximize the valvetrain efficiency for many popular Chevrolet, other General Motors, Ford, Mopar, OEM and...Assorted shims for a quality installationAvailable for small block or big block applications$606.76
- PRW®Platinum Series PQx™ Shaft Mount Rocker Arm System (3339032-01)Platinum Series PQx™ Shaft Mount Rocker Arm System (3339032-01) by PRW®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$72.26
- PRW®Pro Series Rocker Arm (0246003)Pro Series Rocker Arm (0246003) by PRW®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$343.87
- PRW®Pro Series Rocker Arm (0330205)Pro Series Rocker Arm (0330205) by PRW®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$289.87
- PRW®Pro Series Rocker Arm (0245501)Pro Series Rocker Arm (0245501) by PRW®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$351.87
- PRW®Pro Series Rocker Arm (0230205)Pro Series Rocker Arm (0230205) by PRW®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$324.87
- PRW®Pro Series Rocker Arm Set (0245403)Pro Series Rocker Arm Set (0245403) by PRW®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$351.87
- PRW®Pro Series Rocker Arm Set (0345402)Pro Series Rocker Arm Set (0345402) by PRW®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$315.87
- PRW®Pro Series Rocker Arm Set (0245402)Pro Series Rocker Arm Set (0245402) by PRW®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$351.87
- PRW®Pro Series Rocker Arm Set (0235001)Pro Series Rocker Arm Set (0235001) by PRW®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$324.87
- PRW®Pro Series Rocker Arms (0345501)Pro Series Rocker Arms (0345501) by PRW®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$315.87
- PRW®Pro Series Self-Align Narrow body Rocker Arm Set (0335019)Pro Series Self-Align Narrow body Rocker Arm Set (0335019) by PRW®. 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 deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$289.87
- PRW®Pro Series Self-Align Rocker Arm (0330202)Pro Series Self-Align Rocker Arm (0330202) by PRW®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$289.87
- PRW®Pro Series Self-Align Rocker Arm Set (0335005)Pro Series Self-Align Rocker Arm Set (0335005) by PRW®. 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 deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$289.87
- PRW®Pro Series Self-Align Rocker Arm Set (0235002)Pro Series Self-Align Rocker Arm Set (0235002) by PRW®. 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 deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$329.87
- PRW®Roller-Tip Rocker Arms (0845501)Roller-Tip Rocker Arms (0845501) by PRW®. PRW Pro Series Stainless Steel Rocker Arms incorporate an exceptional design that provides plenty of clearance for large diameter springs. These stud mount rocker arms are manufactured from...Lightweight designPRW RockerLocs included$155.87
- PRW®Roller-Tip Rocker Arms (0845403)Roller-Tip Rocker Arms by PRW®. PRW Pro Series Stainless Steel Rocker Arms incorporate an exceptional design that provides plenty of clearance for large diameter springs. These stud mount rocker arms are manufactured from premium...Lightweight designPRW RockerLocs included$155.87
- PRW®Roller-Tip Rocker Arms (0830201)Roller-Tip Rocker Arms (0830201) by PRW®. PRW Pro Series Stainless Steel Rocker Arms incorporate an exceptional design that provides plenty of clearance for large diameter springs. These stud mount rocker arms are manufactured from...Lightweight designPRW RockerLocs included$155.87
- PRW®Self-Align Roller-Tip Rocker Arms (0835019)Self-Align Roller-Tip Rocker Arms (0835019) by PRW®. PRW Pro Series Stainless Steel Rocker Arms incorporate an exceptional design that provides plenty of clearance for large diameter springs. These stud mount rocker arms are...Lightweight designPRW RockerLocs included$155.87
- PRW®Sportsman™ Rocker Arm (0335101)Sportsman™ Rocker Arm (0335101) 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...Made with precision and quality in mindDesigned to meet your specific needs$343.87
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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