Speed-Pro File Fit Plasma Moly Piston Ring Set - 4.125" Bore (+.035") - Top Ring: 1/16", 2nd Ring: 1/16", Oil Ring: 3/16", Oil Tension Ring: Standard 30005R The 6EFI is designed to

The 6EFI is designed to work in harmony with electronic fuel injection systems and comes with detailed wiring instructions making installation a breeze

594 in Inlet Tube

Using upgraded components

H80 Double Talk and other brand double talk intercom headset systems

Excellent low-temperature fluidity

Speed-Pro File Fit Plasma Moly Piston Ring Set - 4.125" Bore (+.035") - Top Ring: 1/16", 2nd Ring: 1/16", Oil Ring: 3/16", Oil Tension Ring: Standard 30005R The 6EFI is designed toSpeed 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