Speed Pro Economy Piston Rings 4.155" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Iron 4125BU Must Be Used With MSD

Must Be Used With MSD 6/7 Series Ignitions

High Quality Zinc-Plated U-Bolts

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

31 in Length

1984-1996 GMC K2500 Suburban

Speed Pro Economy Piston Rings 4.155" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Iron 4125BU Must Be Used With MSDProduct 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