Speed-Pro File Fit Plasma Moly Piston Ring Set - 4.000" Bore (+.045") - Top Ring: 1/16", 2nd Ring: 1/16", Oil Ring: 3/16", Oil Tension Ring: Standard 23011806 On a modified GMC diesel

On a modified GMC diesel truck

All dry sump pulleys aremade to accept a 5/8" shaft

-3 AN Conical Seals

For Magneto and other ignitions that do not require (EMI) suppression

premium grade aerospace chrome moly steel

Speed-Pro File Fit Plasma Moly Piston Ring Set - 4.000" Bore (+.045") - Top Ring: 1/16", 2nd Ring: 1/16", Oil Ring: 3/16", Oil Tension Ring: Standard 23011806 On a modified GMC dieselSpeed 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