98ci Big Bore Kit - Silver. Fits Fits Twin Cam 1999-2006

Features & Benefits:-

* Includes 10cc Dome Forged Pistons.

* Includes 0.045" Head Gaskets.

* 3.937" Bore.

* 4" Stroke.

* 10.3:1 Compression Ratio with Stock 85cc Heads.

* 9.9:1 Compression Ratio with S&S 89cc Heads # SS106-4270.

Suggested Additional Purchase:

Dual spray piston cooling jet kit # SS310-1251

Tech Tips:-

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

Proudly Made in the USA by S&S Cycle !