Valvetrain

Start any engine regardless of displacement or compression ratio with a stock starter Save your starter and battery; tested for 10,000 starts without running battery down Allow for easy start by...

High-powered cam for modified engines, increased compression, high-lift springs, adjustable pushrods and large bore throttle body required For best results, requires ported heads low restriction...

Start any engine regardless of displacement or compression ratio with a stock starter Save your starter and battery; tested for 10,000 starts without running battery down Allow for easy start by...

.4375" diameter pushrods adjust from 8.750" to 10.750" on Twin Cam models and from 9.500" to 11.500" on 80" Evolution models Speed up the installation of performance cams, rockers or other...

.4375" diameter pushrods adjust from 8.750" to 10.750" on Twin Cam models and from 9.500" to 11.500" on 80" Evolution models Speed up the installation of performance cams, rockers or other...

Made from aircraft-grade seamless 4130 chromoly heat-treated steel tubing to be lighter and stronger than stock Contains two intake and two exhaust pushrods for the most accurate geometry and best...

Rocker boxes must be removed for installation or removal. Sold in sets of four. .4375" diameter chromoly steel for maximum strength. Made in the U.S.A.

Rocker boxes must be removed for installation or removal. Sold in sets of four. .4375" diameter chromoly steel for maximum strength. Made in the U.S.A.

Rocker boxes must be removed for installation or removal. Sold in sets of four. .4375" diameter chromoly steel for maximum strength. Made in the U.S.A.

Replacement bronze bushing for big twin gear covers used on 1973-1992 models. Made in the U.S.A. Compatible Vehicles

S&S - BILLET TAPPET GUIDES (LIFTER BLOCKS) Part of S&S's top-of-the-line engine kits. Made in the U.S.A. Sold in pairs. Machined from solid billet aluminum with chrome finish. Available for...