S&S CYCLE Top End Kit - Big Twin 90-0098

If you're running a Big Twin and want bolt-on power without the machine shop downtime, the S&S Cycle Top End Kit delivers a complete, ready-to-install solution. Pre-fit pistons and precision-engineered cylinder heads mean you can go from stripped engine to running in a single day. This is the kind of kit that separates serious builders from amateurs—everything you need, nothing you don't.

The kit includes S&S Shovelhead-style cylinder heads paired with forged 8:1 compression pistons, all pre-fitted to stock bore cylinders so there's zero guesswork during assembly. You get manifold clamps, seals, complete hardware, and gaskets—the entire top end is accounted for. Built in the U.S.A., this is the kind of quality that holds up to sustained high RPM running.

• S&S Shovelhead cylinder heads
• Stock bore cylinders included
• 3-7/16" bore (74" engines)
• 3-1/2" bore (80" engines)
• Forged pistons, 8:1 compression
• Piston rings and wrist pins
• Pre-fit, no machine work
• Manifold clamps and seals
• Complete gasket set
• All fasteners included
• Made in U.S.A.
• Bolt-on installation