- These low compression 3-1/2" bore forged stroker pistons for 1984-'99 HD big twins are a low compression option for 89" stroker kits for 1984-'99 with 4-5/8" stroke flywheels and S&S Super Stock heads
- 10:1 compression ratio
- 5.625" stroke length
- Domed piston head shape
- Piston kits include forged pistons (unless noted) rings, wrist pins and clips for a complete motor replacement
- Rings come as sets for two pistons
- Made in the U.S.A