Product Description :
**Excludes Twin Cooled**
Increased fin area for better heat dissipation
Increase bore size from 3.750" to 3.927"
4 3/8" stroke, 10:1 comp. w/ stock heads
Easy installation; no machining or rebalancing required
Forged coated pistons are compatible with stock or S&S Super Stock 79cc and 89cc heads
Valve pocket recessed in S&S pistons are enlarged for oversize valves and higher lift cams
Maintains stock engine height and stock piston weight
11 fins and full fin pattern on cam side of cylinders closely resembles OEM shape
Kit includes; S&S cylinders with gaskets, piston set with rings, top end gasket kit, pushrods, tappets, 585CE chain-drive easy start cams and instructions
A fuel system is not included
Product Name: Performance Kit
Style: Big Bore
Model: Hot Setup
Base Color: Black
Stroke Length: 4-3/8"
Bore Size: 3.927"
Compression Ratio: 10.0:1