Speed Pro Economy Piston Rings 4.155" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Iron 4125BU Add the proven design elements

Add the proven design elements of the popular Ultra series for more tunability

High Quality Zinc-Plated U-Bolts

1951-1951 Oldsmobile Standard 88

1984-1996 GMC K2500 Suburban

Must Be Used With MSD 6/7 Series Ignitions

Speed Pro Economy Piston Rings 4.155" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Iron 4125BU Add the proven design elementsProduct 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