Speed Pro Economy Piston Rings 4.250" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Iron AA0710AF1T59 GMC: Sierra 2500 01 -

GMC: Sierra 2500 01 - 04 6 L Engine

Billet housing is 5/8" smaller in diameter than stock Ford distributors

These cyilnder heads were targeted at larger cubic inch engines

For either square- or spread-bore carbs

3/8 in Hose Barb Fitting Included

Speed Pro Economy Piston Rings 4.250" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Iron AA0710AF1T59 GMC: Sierra 2500 01 -Product Description: Piston Rings Economy 4. 250 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