Speed-Pro File Fit Plasma Moly Piston Ring Set - 4.000" Bore (+.025") - Top Ring: 1/16", 2nd Ring: 1/16", Oil Ring: 3/16", Oil Tension Ring: Standard 32020P Pan Height: 2

Pan Height: 2

Shot peening is a process by which small metallic particles are used to impact the surface of the material being used in a part's construction and creates compressive residual stresses on that surface

Swirl Polished and Fully Machined

Drag racing's biggest stars have relied on Hays since SEMA Hall of Famer Bill Hays decided back in 1958 that there had to be a way to build a clutch that could stand up to racing's unimaginable power and torque

Easily programmable through a Mini-USB communication port

Speed-Pro File Fit Plasma Moly Piston Ring Set - 4.000" Bore (+.025") - Top Ring: 1/16", 2nd Ring: 1/16", Oil Ring: 3/16", Oil Tension Ring: Standard 32020P Pan Height: 2Speed Pro designs and engineers pistons to meet the most demanding street performance and racing conditions. In combination, we draw upon more than 100 years of Speed Pro engine mastery to enhance the piston ring and its seal. Our Speed Pro brand is recognized for being a winner in every form of racing, and is the proven horsepower leader in oval track and drag racing. Hell Fire Rings: Speed Pro Hell Fire rings, manufactured from a specially hardened