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

Product Details







Features & Benefits:-* Heat-treated 4140 material is harder & 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 & less vibration.* Reduced mainshaft deflection at high rpm – less vibration, reduced piston & 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 stockTech Tips:-* 2003-2006 motors can be upgraded to the stronger “Timken” crankcase bearing. Part # SS320-0397Proudly Made in the USA by S&S Cycle !
MFR PART No: 320-0396

ROLLIES PART No: SS320-0396






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