S&S Cycle 74" Top End Replacement Kit - 1966-1978 Big Twins With O-ring Heads
Replace that worn out top end with the S&S 74" top end replacement kit.
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
The moderate 8:1 compression rato allows your engine run well on readily available premium pump gas.
Made in the U.S.A.
Bore Size: 3.4375"
Stroke Length: 3-31/32"
Compression Ratio: 8.0:1