Description

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 # SS106-4270.

Tech Tips:-

* Will Not Fit with S&S 79cc Heads.

Proudly Made in the USA by S&S Cycle !