Top End

These forged pistons are designed for use in S&S® Big Bore Hot Set Up Kits® for HD® Evolution® big twin engines, and S&S® 3-5/8" bore engines with S&S® Super Stock® cylinder heads and 4-1/4�, 4-1/2" and 4-5/8" stroke engines with stock diameter...

Intended to replace the cylinders and pistons of a 80" Shovelhead engine and maintain the stock compression ratio of 8:1Compatible with stock or S&S cylinder headsIncludes S&S 3.5" bore high tensile cast iron cylinders, 3.5" bore forged standard...

Cylinder and piston kit can be used to build an 88" engine, or to replace the cylinders and piston in an engine with an existing S&S stock bore stroker kitIncludes 3-5/8" bore high tensile cast iron cylinders, forged pistons with rings and wristpins,...

Stock replacement cylinders, 3.5" bore with cast-iron linerFor 80" or 89" enginesMade in the U.S.A.

Cylinders are constructed from premium aluminum castings with cast-in iron linersKits include cylinders, pistons, rings and gaskets (head, base and exhaust)Black powder-coat finishMade in the U.S.A.This project requires a skilled technician. It is the...

Stock replacement cylinders, 3.5" bore with cast-iron linerFor 80" or 89" enginesMade in the U.S.A.

Black Diamond? valves are CNC machined from one-piece forgings of EV8 Stainless SteelBlack Diamond? proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wearMade in the U.S.A. BMW -- R100 -- (1990, 1985,...

Black Diamond? valves are CNC machined from one-piece forgings of EV8 Stainless SteelBlack Diamond? proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wearMade in the U.S.A. BMW -- R 90 -- (1975, 1974,...

Extensive R&D on all applications to provide high-performance components that last longer than OEMSuper-clean silicon wire used in valve springs is ground, not shaved, and X-rayed at regular intervals to check for flawsAll components made in the U.S.A...

Precision-machined from C630Compatible with no-lead fuel and accept any type of valve-stem materialProvide maximum service with chromed valve stemsFeature a tapered nose design for maximum bearing service and minimal port obstruction; improves flow...

Precision-machined from C630Compatible with no-lead fuel and accept any type of valve-stem materialProvide maximum service with chromed valve stemsFeature a tapered nose design for maximum bearing service and minimal port obstruction; improves flow...

Electric compression releases open when you press the start button and close when the button is releasedManual compression releases are opened manually and close when the motor startsKits include the required parts for installationFor ease of...