Speed Pro Premium Piston Rings 4.185" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Moly 2020005 they include the dyno data

they include the dyno data of each one

Operating Pressure 2250 psi

Big Block / Small Block Ford

Edelbrock Heads

Speed Pro Premium Piston Rings 4.185" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Moly 2020005 they include the dyno dataProduct Description: Piston Rings Performance 4. 185 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