Top End

Cylinder and piston kits contain S&S 3-1/2" bore (80") cylinders and forged pistons, rings, wrist pins, and head and base gasketsThe pistons included in kits are flat-topped cast pistons designed to be used with either stock cylinder heads or with S&S...

Cylinder and piston kits contain S&S 3-1/2" bore (80") cylinders and forged pistons, rings, wrist pins, and head and base gasketsThe pistons included in kits are flat-topped cast pistons designed to be used with either stock cylinder heads or with S&S...

Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side modelsCylinder Head Service Kits include the below components:Lightweight Racing Valve Spring kits with steel or titanium retainers, beehive or...

Billet Head Breather Kit - Anodized Blue - M8 900-1186

Rocker Arm shafts, Rocker Arm Stud Kit, Head Bolt Kit and Performance Roller Rocker Arms are included in this kitRocker Arm ShaftsReplace broken or worn OEM pieces with stronger, more durable S&S performance partsDirect replacement for stock...

Made in the U.S.A.

Forged from 8620 steel, heat-treated then shot-peened for additional strength and durabilityRocker arms have .75" long bushings instead of the .50" long bushings found on most other rocker armsFeature a modified lubrication system with unrestricted...

Forged from 8620 steel, heat-treated then shot-peened for additional strength and durabilityRocker arms have .75" long bushings instead of the .50" long bushings found on most other rocker armsFeature a modified lubrication system with unrestricted...

Unique S&S design dual-spring kit reduces the risk of valve floatFor valve lift to .585" with 1.800"/130 lb. installed height, 325 lb. at max liftIncludes springs, top and bottom collars, keeper shims and valve sealsMade in the U.S.A.

Unique S&S design dual-spring kit reduces the risk of valve floatFor valve lift to .585" with 1.800"/130 lb. installed height, 325 lb. at max liftIncludes springs, top and bottom collars, keeper shims and valve sealsMade in the U.S.A.

Unique S&S design dual-spring kit reduces the risk of valve floatFor valve lift to .585" with 1.800"/130 lb. installed height, 325 lb. at max liftIncludes springs, top and bottom collars, keeper shims and valve sealsMade in the U.S.A.

High port flow gives great performance now, and more later when additional upgrades are doneHeads are fully assembled with springs and valvesCompression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see Compression...