Speed-Pro Standard Gap Plasma Moly Piston Ring Set - 4.000" Bore (+.030") - Top Ring: 1/16", 2nd Ring: 1/16", Oil Ring: 3/16", Oil Tension Ring: Standard 91609149 May not fit models with

May not fit models with a body lift or transmission/ transfer case drop

- Twist-On Style - Race Only

once your vehicle is firmly chocked in place

For Use With 322/364/401/425 cu

640" Inside Diameter

Speed-Pro Standard Gap Plasma Moly Piston Ring Set - 4.000" Bore (+.030") - Top Ring: 1/16", 2nd Ring: 1/16", Oil Ring: 3/16", Oil Tension Ring: Standard 91609149 May not fit models withSpeed 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(R) 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(R) Rings: Speed Pro Hell Fire rings, manufactured from a specially