S&S CYCLE - 90-0097 - Top End Kit - 3.4375” Bore - 74” Big Twin '66-'84

For riders who demand quality in every component, the S&S CYCLE 90-0097 is a cylinder kit built to the standards that experienced powersports enthusiasts recognize the moment they put it in their hands. Includes a set of S&S Shovelhead-style cylinder heads, a pair of S&S stock bore cylinders (3-7/16” for 74” engines or 3-1/2” for 80”), forged 8:1 compression pistons complete with rings and wrist pins, manifold clamps, manifold seals, all required hardware, and gaskets. Pistons are pre-fit to the cylinders, so there is no machine work to be done and very little down time, giving you a level of quality that holds up across the full service life of the component. Stroke Length: 3-31/32”. Bore Size: 3.4375”. Compression Ratio: 8.0:1. Whatever the application demands, the 90-0097 gives you a component built to meet it. Sold as a complete kit.

Features

• Includes a set of S&S Shovelhead-style cylinder heads, a pair of S&S stock bore cylinders (3-7/16” for 74” engines or 3-1/2” for 80”), forged 8:1 compression pistons complete with rings and wrist pins, manifold clamps, manifold seals, all required hardware, and gaskets
• Pistons are pre-fit to the cylinders, so there is no machine work to be done and very little down time
• Made in the USA

Specs

• Stroke Length: 3-31/32”
• Bore Size: 3.4375”
• Compression Ratio: 8.0:1
• Product Name: Cylinder Kit
• Displacement: 74”
• Units: Kit
• Riding Style: Street