S&S CYCLE Piston Kit 106-0432

If you're running a Big Twin with stock displacement limits holding you back, the S&S CYCLE 1250cc piston kit unlocks meaningful power gains while maintaining reliability on the street or strip. This cast flat-top design delivers a solid 10.3:1 compression ratio—aggressive enough for noticeable performance without requiring exotic fuel or exotic tuning. Whether you're refreshing worn cylinders or building a complete top-end, this kit gives you the displacement bump that makes a real difference in throttle response and mid-range torque.

• Displacement: 883cc/1200cc to 1250cc
• Compression Ratio: 10.3:1
• Piston Type: Cast flat-topped
• Bore Size: 3-9/16"
• Fitment: 1984–1999 HD Big Twins
• Compatible Heads: Stock 1200cc or S&S CNC ported
• Cylinder Compatibility: Stock 1200cc cylinders; 1986–2003 883cc cylinders (bored); 2004–2016 883cc cylinders not compatible
• Installation: Requires cylinder boring/honing
• MPN: 106-0432