S&S 4in. Stroke Flywheel Assembly. Fits Twin Cam Softail 2003-2006.

Description

Features & Benefits:-

* Heat-treated 4140 material is harder & 114% stronger than stock.

* Harder material, eliminates thrust washer.

* Larger 1.671in. diameter crankpin.

* Designed with increased cross-sectional area for increased crank-pin clamping force – No welding required.

* Integral mainshafts – Eliminates two potential points of weakness.

* Consistent balance and precision machining – Truer flywheels & less vibration.

* Reduced mainshaft deflecti