4in. Stroke Flywheel Assembly. Fits Twin Cam Dyna 2003-2005 & Touring 2003-2006.

Features & Benefits:-

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

* Harder material, eliminates thrust washer

* Larger 1.671" 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 and less vibration

* Reduced mainshaft deflection at high rpm – less vibration, reduced piston and rod side thrusting, prevents oil pump damage, fully compatible with gear drive cams

* Capable of higher rpm – More available power!

* Trued to with in .0005" TIR

* Rod Bearings have 20 rollers vs 18 stock

Tech Tip:-

* Does Not Fit Dyna 2006.