Description
If you’re running an 883cc or 1200cc Big Twin and want genuine displacement gains without a complete engine teardown, this S&S piston kit delivers a straightforward path to 1250cc performance. The 10.3:1 compression ratio strikes a practical balance between increased power and reliability on stock or performance heads. Cast flat-topped pistons engineered for HD Big Twins since 1984 mean you’re getting proven durability with measurable cubic inches—no marketing hype, just real displacement.
- Displacement: 883cc/1200cc to 1250cc
- Compression ratio: 10.3:1
- Bore: 3-9/16″
- Piston type: Cast flat-topped
- Material: Cast aluminum alloy
- Fitment: 1984–1999 HD Big Twins
- Compatible heads: Stock 1200cc or S&S performance
- Installation: Professional boring required
- MPN: 106-0433
- Manufacturer: S&S Cycle
- Note: Requires cylinder boring (consult compatibility chart)
