S&S Cycle 94-1221X Replacement Piston Ring Set Bore Oversize - 3-5/8 010

The S&S Cycle 94-1221X is a replacement piston ring set designed exclusively for S&S Cycle forged pistons with a 3-5/8" (3.625") bore. This is the +.010" oversize version, intended for engines that have been bored 0.010" over the standard dimension — ideal for engine rebuilds or refreshes where cylinder wear has required a slight overbore.

Key Features:

• Designed for S&S Cycle forged pistons only — not a universal ring set
• 3-5/8" (3.625") bore diameter with +.010" oversize sizing
• Each set includes rings for two pistons
• Made in the USA
• Engineered to S&S Cycle's precise tolerances for optimal compression and oil control
• Compatible with S&S big bore and hot set-up engine configurations

S&S Cycle replacement ring sets are the correct OEM-spec choice when rebuilding or freshening an engine originally built with S&S forged pistons. Using the proper oversize ring ensures correct gap clearance, maximum compression sealing, and long service life.