320-0475 Flywheel assembly for 124" T-series 4-1/8" bore engines

This S&S flywheel assembly is built for serious power, specifically designed for 124-inch T-series engines with a 4-1/8" bore. It features a 4-5/8" stroke and 8-1/2" diameter flywheels, balanced for a 1035-gram total piston weight. While it is a stock replacement for S&S engines, it also serves as a high-performance upgrade for 1999 to 2006 Twin Cam models, excluding the 2006 Dyna. These flywheels are engineered to work with Timken-style sprocket shaft bearings, making them a direct fit for 1999 to 2002 cases. For later 2003 to 2006 cases, they can be used with the stock roller bearing, OEM 24004-03B, though a Timken conversion is often recommended for high-output builds. Sold as a set, this assembly arrives ready to install.