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Bolt on big bore kits mean easy installation with no machining and no rebalancingS&S bolt-in cams and premium tappets make the most of the added displacementCams are .482" lift and 240?? duration intake and 234?? degree duration exhaustCompression ratio...

Bolt on big bore kits mean easy installation with no machining and no rebalancingS&S bolt-in cams and premium tappets make the most of the added displacementCams are .482" lift and 240?? duration intake and 234?? degree duration exhaustCompression ratio...

Forged pistons - coated piston skirts with measurement window and S&S logoForged pistons have larger than stock valve pockets and accepts up to 2.00" valvesKit includes S&S 1250cc pistons with rings and wristpins, S&S 3-9/16" bore cylinders, MLS head,...

Forged pistons - coated piston skirts with measurement window and S&S logoForged pistons have larger than stock valve pockets and accepts up to 2.00" valvesKit includes S&S 1250cc pistons with rings and wristpins, S&S 3-9/16" bore cylinders, MLS head,...

Forged pistons - coated piston skirts with measurement window and S&S logoForged pistons have larger than stock valve pockets and accepts up to 2.00" valvesKit includes S&S 1250cc pistons with rings and wristpins, S&S 3-9/16" bore cylinders, MLS head,...

Forged pistons - coated piston skirts with measurement window and S&S logoForged pistons have larger than stock valve pockets and accepts up to 2.00" valvesKit includes S&S 1250cc pistons with rings and wristpins, S&S 3-9/16" bore cylinders, MLS head,...

The Big Bore kit yields excellent results with stock cylinder headsEasy installation: no need to bore or split existing cases, just swap the cylindersCylinders are constructed from premium aluminum castings with cast-in iron linersKits include cylinders,...

Bolt-on cylinder setFor 4.375" stroke motorsMade in the U.S.A.

Bolt-on cylinder setFor 4.375" stroke motorsMade in the U.S.A.

Bolt in - no machining, balancing or splitting the crankcases; install can be performed with engine still in frameCast Ductile Iron Sleeve in cast aluminum for superior heat transfer88" engines are boosted to 100"96" and 103" engines are boosted 110"10...

Bolt in - no machining, balancing or splitting the crankcases; install can be performed with engine still in frameCast Ductile Iron Sleeve in cast aluminum for superior heat transfer88" engines are boosted to 100"96" and 103" engines are boosted 110"10...

Bolt in - no machining, balancing or splitting the crankcases; install can be performed with engine still in frameCast Ductile Iron Sleeve in cast aluminum for superior heat transfer88" engines are boosted to 100"96" and 103" engines are boosted 110"10...