Speed Pro Economy Piston Rings 4.020" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Iron H759C02 Requires precision measuring of the

Requires precision measuring of the cap bore and milling of cap parting line to install

that measures 2-1/4" and works with all 2-1/2" I

For a full list of advanced features such as boost

2) B/B Chevy Rectangular Port

Speed Pro Economy Piston Rings 4.020" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Iron H759C02 Requires precision measuring of theProduct Description: Piston Rings Economy 4. 020 in Bore Drop In 5 64 x 5 64 x 3 16 in Thick Standard Tension Cast Iron Phosphate 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