S&S Cycle 80" Shovelhead Top End Kit

Features:

• S&S now offers Shovelhead style top end kits that provide everything you need to replace the top end of a 80" Shovelhead engine
• Kit includes a set of S&S Shovelhead style cylinder heads, a set of S&S stock bore cylinders (3-1/2" for 80"), S&S cast 8:1 compression pistons complete with rings and wrist pins, manifold clamps, manifold seals, all required hardware and gaskets
• 4 1/4" stroke pistons and rubber band style cylinder heads are also included
• Pistons are pre-fit to the cylinders, so there is no machine work done and very little down time

Note: 74" engines have a stroke of 331/32in, and 80" shovelhead engines have a 4" stroke, but the cylinder length for both engines is the same. The 74" piston is taller than the 80" piston which results in the same piston to head clearance in both engines. While it is possible to install an 80" top end on a 74" engine, this will result in very low compression and poor performance. A 74" top end will bolt to an 80" crankcase, but, the pistons will contact the cylinder head due to the combination of the taller 74" pistons and the longer stroke of the 80" flywheels. Therefore, it is important to correctly identify the stroke of the engine before ordering a top end kit