- These high compression 3-1/2" bore forged stroker pistons for 1984-'99 HD big twins are a high compression option for 89" stroker kits for 1984-'99 with 4-5/8" stroke flywheels and S&S Super Stock heads. 12:1 compression
- 12:1 compression ratio
- 4.625" stroke length
- Piston Kits include forged pistons, rings, wrist pins, and clips for a complete motor
- Flat-Topped Replacement Piston Kits For '84-'99 HD Big Twins with Stock Heads or S&S Performance Replacement Heads
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 2002-2003 | Harley-Davidson | Sportster 1200 Custom XL1200C | |
| 1996-2001 | Harley-Davidson | Sportster 1200 Custom XLH1200C | |
| 2002-2003 | Harley-Davidson | Sportster 1200 Sport XL1200S | |
| 1996-2001 | Harley-Davidson | Sportster 1200 Sport XLH1200S | |
| 1991-2003 | Harley-Davidson | Sportster 1200 XLH1200 | |