Pistons - Rings - Cylinders

Big Bore kit yields excellent results with stock cylinder heads This is the largest bore (3.937") that can fit in a stock engine case Stock engine height is maintained so there are no manifold or...

Big Bore kit yields excellent results with stock cylinder heads This is the largest bore (3.937") that can be fit in a stock engine case Stock engine height is maintained so there are no manifold or...

High quality replacement cylinder studs provide increased strength and extended durability 3/8-16 x 5.760" Meet or exceed OE standards Made in the U.S.A.

High quality replacement cylinder studs provide increased strength and extended durability 3/8-16 x 6.070" Meet or exceed OE standards Made in the U.S.A.

High quality replacement cylinder studs provide increased strength and extended durability 3/8-16 x 6.680" Meet or exceed OE standards Made in the U.S.A.

Inspired by our Pro Stock Drag Race engines, these updated big bore kit utilizes a Ductile Cast Iron liner wrapped in cast aluminum for optimum thermal conductivity and performance Bolt-in kits do...

Inspired by our Pro Stock Drag Race engines, these updated big bore kit utilizes a Ductile Cast Iron liner wrapped in cast aluminum for optimum thermal conductivity and performance Bolt-in kits do...

Inspired by our Pro Stock Drag Race engines, these updated big bore kit utilizes a Ductile Cast Iron liner wrapped in cast aluminum for optimum thermal conductivity and performance Bolt-in kits do...

Inspired by our Pro Stock Drag Race engines, these updated big bore kit utilizes a Ductile Cast Iron liner wrapped in cast aluminum for optimum thermal conductivity and performance Bolt-in kits do...

4.25" stroke length Flat top piston head shape +0.020" bore oversize These forged, 4" bore flat-topped pistons are intended for use in S&S 4" bore Super Sidewinder engines as well as other custom 4"...

Deck height is 1.0985" Wristpin diameter is .927" Standard 4.0" bore Piston features a 12.5cc raised dome to achieve a compression ratio of 10.6:1 For 2007-'17 HD CVO 110 engines (except '17...

4.25" stroke length Flat top piston head shape These forged, 4" bore flat-topped pistons are intended for use in S&S 4" bore Super Sidewinder engines as well as other custom 4" bore engines Piston...