11-9740 - 80 Shovelhead Piston Set .020 Oversize

Wiseco piston set is .020 oversize and is for a 3-1/2 inch bore. Piston set has a compression of 9.5:1 and includes rings. **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings.