Speed Pro Premium Piston Rings 4.420" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Moly Motor Mount Insert All Performer and Performer RPM

All Performer and Performer RPM B/B Chevy heads have spark plugs relocated closer to center of bore which will interfere with high-dome pistons for open chamber heads

and the new standard of excellence in endurance racing today

All BMR springs are manufactured from chrome silicon high-tensile spring wire

Pro Shift-Lite Level 1

Speed Pro Premium Piston Rings 4.420" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Moly Motor Mount Insert All Performer and Performer RPMProduct Description: Piston Rings Performance 4. 420 in Bore Drop In 5 64 x 5 64 x 3 16 in Thick Standard Tension Steel Moly 8 Cylinder From pistons to engine bearing components, Speed Pro offers an array of performance engine parts. You can rely on Speed Pro for industry leading performance engine technologies, from cutting edge Digital Diamond Profiled pistons to A Series bearings. They are engine components performance enthusiasts and racers can