Speed Pro Economy Piston Rings 4.125" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Iron NW100020 The Mid-Length Tube Header Design

The Mid-Length Tube Header Design Provides Significantly More Low and Mid-range Power than Cast Manifolds

Big Block Chevy / Mopar V8 / Ford V8

5-1/4 in Wide x 1-3/4 in Tall

42" to the lifter valley cover flange on engine block

Nitrous Oxide Nozzle

Speed Pro Economy Piston Rings 4.125" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Iron NW100020 The Mid-Length Tube Header DesignProduct Description: Piston Rings Economy 4. 125 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