Description
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 .
These pistons may also be used in stock stroke 1200cc HD® Sportster® models with S&S® Super Stock heads.10:1 compression.
Standard bore.
Fitment
| Year(s) | Make | Model Code | Model |
|---|---|---|---|
| 1984-1999 | Harley-Davidson | — | Big Twin |
| 1986-2003 | Harley-Davidson | — | xl |
