Valves & Valvetrain Parts
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- SKP®Rocker Arm (SKMR1341)Rocker Arm (SKMR1341) 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 at an...Precise engineering ensures second to none quality and lasting valueStringently tested with the highest quality standards$12.51
- SKP®Rocker Arm (SKMR1323)Rocker Arm (SKMR1323) 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 at an...Precise engineering ensures second to none quality and lasting valueStringently tested with the highest quality standards$5.28
- Sealed Power®Rocker Arm Kit (R-881B)Rocker Arm Kit (R-881B) 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...Direct replacementManufactured to strict engineering quality standards$7.10
- Sealed Power®Stamped Steel Driver Side Rocker Arm Kit (R-870)Driver Side Stamped Steel Rocker Arm Kit (R-870) 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...Direct replacementManufactured to strict engineering quality standards$8.24
- Enginetech®Driver Side Rocker Arm (ER713L)Driver Side Rocker Arm (ER713L) 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...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$31.14
- Enginetech®Exhaust Rocker Arm (ER909)Exhaust Rocker Arm (ER909) 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,...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$22.95
- Enginetech®Rocker Arm (ERK890)Rocker 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$21.76
- Enginetech®Rocker Arm (ERK889)Rocker Arm (ERK889) 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,...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$9.39
- Enginetech®Rocker Arm (ERK395)Rocker 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$8.99
- Enginetech®Rocker Arm (ER911)Rocker Arm (ER911) 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,...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$15.63
- Enginetech®Rocker Arm (ER668)Rocker Arm (ER668) 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,...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$13.03
- Enginetech®Rocker Arm (ER1807)Rocker 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$52.07
- Enginetech®Rocker Arm (ERK346)Rocker Arm (ERK346) 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,...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$5.22
- Enginetech®Rocker Arm (ERK674)Rocker Arm (ERK674) 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,...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$13.32
- Enginetech®Rocker Arm (ERK383)Rocker Arm (ERK383) 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,...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$9.02
- Enginetech®Rocker Arm (ER901)Rocker Arm (ER901) 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,...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$11.76
- Enginetech®Rocker Arm (ER700)Rocker 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$28.37
- Enginetech®Rocker Arm (ER434)Rocker Arm (ER434) 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,...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$39.58
- Enginetech®Rocker Arm (ER1806)Rocker Arm (ER1806) 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,...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$42.85
- Enginetech®Rocker Arm (ER910)Rocker Arm (ER910) 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,...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$15.63
- Enginetech®Rocker Arm (ER703)Rocker Arm (ER703) 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,...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$7.63
- Enginetech®Rocker Arms (ER1313)Rocker Arms (ER1313) 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,...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$45.23
- Enginetech®Rocker Arms (ER010-4)Rocker Arms (ER010-4) 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,...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$15.56
- Enginetech®Rocker Arms (ER9111)Rocker Arms (ER9111) 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,...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$31.61
- Enginetech®Rocker Arms (ER411)Rocker Arms (ER411) 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,...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$23.45
- Original Equipment®Rocker Arm (93010504305)Rocker 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$167.12
- 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 (S-1028)Rocker Arm Kit (S-1028) 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$19.72
- 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
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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