Speed Pro Speed Pro Piston Forged 4.030" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 2.7 cc R07C15W44 Detroit Truetrac Differential

Detroit Truetrac Differential

Replaces lubrication lost by wash of dry fuels

Special underhead serrations prevent loosening and the wide flange head distributes uniform clamping pressure for an Ultra gasket seal

Aluminum / Stainless

Speed Pro Speed Pro Piston Forged 4.030" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 2.7 cc R07C15W44 Detroit Truetrac DifferentialFully updated skirt profiles Exclusive DUROSHIELD skirt coating. DUROSHIELD provides scuff resistance, reduced bore clearances and enhanced ring sealing. SPEED PRO POWERFORGED pistons are built to stringent specifications with a precision CNC machined dome and skirts and microfinished ring grooves. The manufacturing process ensures that piston weights within a boxed set will not vary more than 4 grams and that skirt sizes are matched to within 0.