24473-85A Crankcases for Late Shovelhead & Evolution Big Twin

These S&S Super Stock crankcases are a top-tier choice for engine builders looking to replace stock units or build a high-performance street racer. Cast from 356-aluminum alloy and heat-treated to T6 specifications, they offer significantly more strength in key areas without interfering with stock frame fitment. This assembly comes well-equipped with crankcase screws, cylinder mounting studs, timing and drain plugs, and the sprocket shaft Timken bearing assembly. The Evolution style cases are specifically machined to accept 1992–1999 style oil filter assemblies and maintain the same oiling and venting provisions found on 1984–1992 models. They are designed to fit a wide range of Big Twins including Dyna, FXR, Softail, and Touring models. Replacing OEM 24473-85A, these cases provide a rock-solid foundation for your next build. Note that the pinion shaft bearing is sold separately to match your specific shaft size.