Product Details
Flathead Forged Piston Set by S&S Cycle®. Flathead Power® Forged 3-5/8" bore stroker pistons replace several cast and forged big bore pistons that S&S® previously offered. Applications for this piston include 88", 4-1/4" stroke, 93", 4-1/2" stroke, and 96", 4-5/8" stroke, engines with stock 8-1/2" diameter flywheels and 98", 4-3/4" stroke, and 103", 5" stroke, engines with 8-1/4" small diameter flywheels. As with the new stock bore stroker piston, the modern metallurgy and advanced skirt profiles allow a relatively close piston fit for low engine noise and long engine life.
Notes
- Compression ratios will change when replacing existing pistons in S&S engines with this series of forged pistons. If higher compression is desired, they suggest shortening cylinders, or decking heads to achieve the desired compression ratio. A change of 0.060" will produce approximately 1 point of change in the compression ratio. S&S offers machine shop services through the S&S Service and Speed Center®. New pistons can be fit to your existing cylinders for a reasonable charge, and cylinders can be shortened to your specifications if higher compression ratio is desired
- This is a Race Only product that is to be used solely for competition. It cannot be used on vehicles that are operated on public streets, roads or highways. Its use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, could be in violation of local, state and federal laws. Shipping Restriction: CA, NY, ME
Features
- Forged pistons for superior strength
- Modern alloys and piston skirt profiles for low noise and long engine life
- Fits 36-84 OHV Big Twin 88, 93, 96, 98 and 103"
- Made in USA
- Precise engineering ensures the latest in quality
- Expertly manufactured from highly reliable materials
- Rigorous quality control and great functionality
Founded in 1958, S&S Cycle® has been providing high performance motorcycle parts for Harley-Davidson® and other v-twin motorcycles for over 55 years. Starting with a simple offering of light weight pushrod kits, the S&S motorcycle performance product line has grown to include exhaust systems, camshafts, carburetors, fuel injection systems, stroker kits, big bore kits, cylinder heads, service replacement parts and complete motorcycle engines for both vintage and modern v-twins.