Speed Pro Speed Pro Piston Forged 4.030" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 2.7 cc Headset Microphones and 68cc exhaust ports

and 68cc exhaust ports

bolt-in replacement for the stock unit

AFR's trademark 3/4'' thick cylinder head deck makes them ideal for heavy nitrous or blower applications

1/2 in NPT Steel Fitting

Speed Pro Speed Pro Piston Forged 4.030" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 2.7 cc Headset Microphones and 68cc exhaust portsFully 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.