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. 10.5:1 compression . Standard bore.
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. 10.5:1 compression . Standard bore.