S&S Cycle 2017+ M8 Models 4.2500in Bore Piston Ring Set - .010in

If you're rebuilding the top end of your 2017 or newer M8 engine, a fresh set of piston rings is essential. These S&S Cycle rings are designed for a 4.2500 inch bore and come in a .010 inch undersize, meaning they're intended for cylinders that have been honed or bored out to that specific dimension. Getting the right ring size is critical for proper compression and oil control, and these well-built rings from S&S Cycle will help you achieve that.

S&S Cycle has been a trusted name in performance engine parts for a long time, and this piston ring set is no exception. They are made to precise specifications to ensure they seat correctly against the cylinder wall and piston groove. This helps prevent blow-by, where combustion gasses escape past the piston, and also keeps oil from getting into the combustion chamber. A proper seal means your engine will run more efficiently and produce the power you expect.

This set is sold as a 2-pack, so you'll have rings for two pistons. Please note that these rings are not CARB approved and cannot be shipped to California.