Speed Pro Forged Piston Set - 4.030" Bore - 5/64 x 5/64 x 3/16" Ring Grooves - Plus 5.3 cc - Coated Skirt - SB Chevy (Set of 8) SR91152PDO-6 GM Fullsize Truck 1960-72

GM Fullsize Truck 1960-72

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30 mm Compression Thickness

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5/8 in Tall

Speed Pro Forged Piston Set - 4.030" Bore - 5/64 x 5/64 x 3/16" Ring Grooves - Plus 5.3 cc - Coated Skirt - SB Chevy (Set of 8) SR91152PDO-6 GM Fullsize Truck 1960-72Fully 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.