S&S Cycle 106-5538

These forged 3 5/8″ bore stroker piston replaces several cast and forged big bore pistons that S&S previously offered. Applications for this piston include 88″ (4 1/4″ stroke), 93″ (4 1/2″ stroke), and 96″ (4 5/8″ stroke) engines with stock 8 1/2″ diameter flywheels, and 98″ (4 3/4″ stroke) and 103″ (5″ stroke) engines with 8 1/4″ small diameter flywheels. As with the new stock bore stroker piston, the modern metallurgy and advanced skirt profiles allow a relatively close piston fit for low engine noise and long engine life. S&S will fit these pistons to your existing cylinders (when purchasing new cylinders, pistons can be fit to them as an option). Install Instructions DownloadAdditional Install Instructions

FITMENT DISCLAIMER

Fitment information is provided as a general reference only and is not guaranteed for any motorcycle, whether stock or modified. Compatibility may vary by year, model, and individual configuration.

Customers are responsible for verifying fitment prior to purchase. House of Harley-Davidson assumes no liability for purchases made based on incorrect or unverified fitment information.

Please contact our Parts Department with any questions before ordering at 414-282-2211