S&S Cycle 84-99 BT Super Stock Cylinder Head Kit For 3-1/2in and 3-5/8in Bore - Natural

If you're looking to build a high-performance engine for your 1984-'99 Harley-Davidson Evolution Big Twin, these S&S Cycle Super Stock cylinder heads are a solid choice. They're designed to help you get the most out of larger displacement engines, supporting big inch builds with their high-flowing ports and large valves. This kit is compatible with a wide range of Harley-Davidson models, including popular bikes like the FLHTC Electra Glide Classic, FLSTF Fat Boy, and FXD Dyna Super Glide, among many others.

These heads feature a specially shaped combustion chamber that works best with specific pistons, which you'll need to purchase separately; they are not compatible with stock flat-topped pistons. The large 2.000-inch intake valves and 1.605-inch exhaust valves, combined with well-designed ports, ensure that plenty of air can get into the cylinders, which is crucial for making power. They can also handle cams with lifts up to .650 inches, giving you flexibility when choosing other engine components. The natural aluminum finish gives a clean, classic look.

This kit is designed to fit both 3-1/2-inch and 3-5/8-inch bore engines. Remember to order the appropriate gasket kits separately based on your specific bore size. These heads are a significant upgrade for anyone serious about engine performance.