The S&S manifold conversion kit is also available to upgrade the intake system on stock Sportster® models. Owners of 1986 - 2003 Sportster® models with the stock "rubber" manifold, can upgrade to an S&S rigid aluminum manifold and eliminate intake leaks due to cracks, and loss of sealing at high rpm due to manifold flex. Since the S&S manifold conversion kit is intended to replace the intake system on stock engines, the manifold provided in the kit is machined to the correct length for a stock displacement engine. The manifold included in the conversion kit is the same one used in S&S Super B and E carb kits and is machined with a 1-7/8" throat diameter. This manifold can be used with S&S Super B and Super E carburetors as well as stock carburetors with a two bolt mounting pattern. In addition to the manifold, the kit includes front and rear manifold mounting flanges, manifold o-rings, and aluminum spacer shims. Fits 1986 - '03 Harley-Davidson® Sportster® models with stock, 4.650", length cylinders and S&S ES, Super B, Super E, Tillotson®, Bendix®, and Keihin® carburetors.