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 Crank Adjuster

Crank Adjuster

000 rpm in just 333 milliseconds ensuring that you never have to worry that your engine is spinning faster than the tach and includes a built-in memory recall to allow review of the highest RPM achieved on your last pass or hook

Protect the lower edge of your nose in style

GM Fullsize Truck 1960-72

30 mm Compression Thickness

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 Crank AdjusterFully 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.