Features & Benefits:-
* Includes 10cc Dome Forged Pistons.
* Includes 0.045in. Head Gaskets.
* 3.937in. Bore
* 4in. Stroke
* 10.3:1 Compression Ratio with Stock 85cc Heads.
* 9.9:1 Compression Ratio with S&S 89cc Heads # SS90-1106.
* Will Not Fit with S&S 79cc Heads.
Proudly Made in the USA by S&S Cycle !