Forged aluminum. Domed 10:1 high compression piston kits include wrist pins; circlips and Hastings rings. Compatible with OEM heads. Note: Pistons will fit stock style Hastings rings with 1.6mm (0.062") top & middle ringlands and 4.0mm oil rings.

Replacement forged piston set. Fits all 100" and 107" 4" bore Super Sidewinder engines. Will also fit the special (out of production) 100" Evo type retro-fit engine for Shovel chassis; which is equipped with small diameter flywheels. Incl. pistons; wrist pins; wristpin clips and piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.

Cast aluminum OEM style pistons for a stock 1200cc Side Valve rebuild. Pistons include wrist pins; retainers & piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.

Cast aluminum OEM style pistons for a stock rebuild. Wil fit all 29-73 45" (750cc) Flathead models. Pistons include wrist pins; retainers and piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.

Replacement recessed dome pistons for 3-5/8" Big Bore applications. Will fit 84-99 Evolution Big Twin models with S&S SuperStock heads only and 3-5/8" bore cylinders in combination with 4-1/4" (5.375" cylinders; 9.4:1CR); 4-1/2" (5.500" cylinders; 9.8:1CR) and 4-5/8" (5.565" cylinders; 10.1:1CR) strokes. S&S tolerance recommendations: Close fit .0015" to .002". Loose fit: .003" to .004". All pistons include wrist pins; wrist pin clips and piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.

High 10:1 compression ratio (standard is 9:1) for stock XL 1000 Sportster models. Will not fit XR style cylinder heads. Incl. forged pistons; wristpins; Hastings rings and circlips.

Forged aluminum. Domed 10:1 high compression piston kits include wrist pins; circlips and Hastings rings. Compatible with OEM heads. Note: Pistons will fit stock style Hastings rings with 1.6mm (0.062") top & middle ringlands and 4.0mm oil rings.

Replacement forged piston set for 4" bore Super Sidewinder Evolution type S&S engines (excl. TC). Pistons include wrist pins; wrist pin clips and piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.

Forged piston kit. 9:1 compression ratio (stock is around 8.5:1). Incl. Hastings rings; wrist pins and circlips. Note: Hastings ringlands used are 1st ring: 1.6mm; 2nd ring: 1.6mm and oil ring: 4.75mm.