Pistons - Rings - Cylinders

Piston kit includes set of forged pistons, rings, wristpins, and clips for a complete motor Will fit up to a 4-5/8" stroke Made in the U.S.A.

Piston kit includes set of forged pistons, rings, wristpins, and clips for a complete motor Will fit up to a 4-5/8" stroke +.010" bore oversize Made in the U.S.A.

Replacement ring sets for S&S pistons only Rings come as sets for two pistons Made in the U.S.A. Compatible Vehicles

Replacement ring sets for S&S pistons only Rings come as sets for two pistons Made in the U.S.A.

Replacement ring sets for S&S pistons only Rings come as sets for two pistons Made in the U.S.A.

Big Bore kit yields excellent results with stock cylinder heads The stock 4-3/8" stroke and 4-1/8" bore result in a 117' displacement Easy installation no need to bore or split existing cases, just...

Big Bore kit yields excellent results with stock cylinder heads The cylinders are machined with the stock bolt pattern and are intended for use in stock crankcases of 2007-'16 big twin engines This...

4.250" bore Complete set of piston rings Made in the U.S.A. Compatible Vehicles

2017+ M8 Models 4.250in Bore Unhoned Front Cylinder Black Granite w/ Highlight

Huge bore increase means huge power increase Works with stock crankcases (no machine work) Powder coat finish matches factory finish MLS (multi-layered steel) head gaskets 4.320" Bore 4.5" stroke...

Complete kits include cylinder sleeves, pistons and head gasket 750cc kit increase bore and stroke to 83.5mm x 67.8mm (stock is 78 mm x 67.8 mm) Increases compression ration to 11.0:1 (stock is 9...