S&S Cycle 106-5555

These forged 3-1/2″ bore stroker pistons for 1984-’99 HD Evolution big twin engines are required for the S&S 89″ stock bore stroker kits, which include S&S 4-5/8″ stroke flywheels. Pistons are designed to be used with stock cylinder heads or with S&S Performance Replacement heads. Low silicon forged material and advanced S&S piston skirt design result in high strengh and low noise. 3-1/2″ +.010″ bore. Install Instructions Download
Additional 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 TEXT 414-282-2211 with any questions before ordering, or use the chat below.