Total Seal Street Piston Rings - 4.055 in Bore - GM Duramax HASZ20AM ) except with cams having

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JBA Evol Exhaust Systems

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Radius Arm Bushing Kit

Total Seal Street Piston Rings - 4.055 in Bore - GM Duramax HASZ20AM ) except with cams havingProduct Description: Piston Rings Street 4. 055 in Bore 3. 0 mm x 2. 0 mm in x 3. 0 mm Thick Standard Tension Steel GM Duramax Total Seal's patented Gapless Piston rings provide increased performance through unmatched sealing of the cylinder and combustion gasses in the combustion chamber. Increased horsepower and torque along with longer engine life are just a couple of the reasons why Total Seal's Gapless A Piston rings are the best rings available.