Speed Pro Economy Piston Rings 4.155" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Iron Neck Roll PROTHANEs design provides superior handling

PROTHANEs design provides superior handling through optimum compliance resistance

and are designed for an exact port match with Dougs headers

1975-1980 Plymouth PB100

This manifold features our High HP runners for use in modified street/strip oriented applications

Speed Pro Economy Piston Rings 4.155" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Iron Neck Roll PROTHANEs design provides superior handlingProduct Description: Piston Rings Economy 4. 155 in Bore Drop In 5 64 x 5 64 x 3 16 in Thick Standard Tension Cast Iron Natural 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