Cylinder Heads & Valvetrain

Features Heads are fully assembled with springs and valves Works great with 88" to 103" stock motors, but are ideal for larger stroker or big bore...

Features Fully assembled, and include stainless steel valves and high-lift springs Optimized for smaller displacement engines Available to be used...

Features Fully assembled, and include stainless steel valves and high-lift springs Optimized for smaller displacement engines Available to be used...

Features High-performance conical single wire valve spring For valve lift to 0.605" with 1.535"/68 lb installed height, 364 lb at max lift Max 650...

Features Include springs, upper and lower collars and keys For valve lift to .650" with 1.860" /178 lbs. installed height, 376 lbs. at max lift Ma...

Features Include springs, upper and lower collars and keys For valve lift to .650" with 1.860" /178 lbs. installed height, 376 lbs. at max lift Ma...

Features Unique S&S design dual-spring kit reduces the risk of valve float Suitable for high performance applications For valve lift to 0.585"...

Features Solid lifter conversion kit with adjustable lifters for '66-'84 Shovelhead engine with stock 5.330" cylinders Adjuster screw in the lifte...

Features 0.4375" diameter chromoly steel for maximum strength Made in the USA Notes Rocker boxes must be removed for installation or removal. Spe...

Features Must allow additional rocker clearance for '48-'65 Panheads Use with stock-style bottom collar, valve guides, valve with stock 3/8" stem ...

Features Machined from solid billet aluminum with chrome finish Part of S&S's top-of-the-line engine kits Available for engines with stock-sty...

Features CNC-machined from 6061 T-6 billet aluminum Billet material provides extra strength and dimensional stability over a wide temperature rang...

Gorilla Rocker Shafts - Stock Replacement - Twin Cam / Evolution Big Twin / XL Precision ground from 4140HT steel, gas nitrided and final surface ...

Gorilla Rocker Shaft and Arp Bolt Kit - 5/16"-18 x 2 3/4" - Early Twin Cam / Evolution / XL Precision ground from 4140HT steel, gas nitrided and f...

Gorilla Rocker Shaft and Arp Bolt Kit - 5/16"-18 x 2 1/2" - Late Twin Cam / XL Precision ground from 4140HT steel, gas nitrided and final surface ...

Adjustable Pushrods - Race Series® - Twin Cam Maintains maximum valve lift Increased stiffness and column rigidity maximizing valve-train stabilit...

HP+® and Race Series® Adjustable Pushrods - Evolution Big Twin Maintains maximum valve lift Increased stiffness and column rigidity maximizing val...

Fast Install® Pushrods - Adjustable - Evolution Big Twin Made from 7/16” diameter 4130 Chromoly steel with the same great design as the regular in...

HP+® Fixed Length Pushrods - Fixed Length - XL Fixed length chrome moly one piece pushrods 3/8" tube with 0.065" wall thickness and 3/8" hardened ...

HP+ One Piece Pushrods - Stock Length - Twin Cam Feuling highly recommends using one-piece pushrods instead of adjustable pushrods to maintain max...

HP+ One Piece Pushrods - 0.030" Longer than Stock - Twin Cam Feuling highly recommends using one-piece pushrods instead of adjustable pushrods to ...

HP+® and Race Series® Adjustable Pushrods - Evolution Big Twin Maintains maximum valve lift Increased stiffness and column rigidity maximizing val...

Pushrod Tube Kit - Twin Cam Pushrod tube kit for use on Twin Cam engines using quick install style pushrods that require more clearance inside the...

Quick Install Pushrods - Adjustable - Twin Cam Strength and rigidity of Quick Install pushrods are second only to heavy-duty one-piece pushrods Tu...