Speed Pro Speed Pro Piston Forged 4.040" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 2.7 cc Distributor Collar 780 in Rectangular Port

780 in Rectangular Port

As the crankshaft turns

Safe/economical solutionNo matter what your lowered truck suspension needs are

1955-1959 GMC S300

Also available now are machine 7

Speed Pro Speed Pro Piston Forged 4.040" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 2.7 cc Distributor Collar 780 in Rectangular PortFully 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.