Speed Pro Speed Pro Piston Forged 4.280" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 29.4 cc AK113112S and rear of the helmet

and rear of the helmet provide maximum air flow

Because E85 fuel can vary in the amount of ethanol and gasoline mixture

Fits Quadrajet

Our patented gauge technology allows the gauge to calibrate on every startup to compensate for altitude

75" Tall x 3

Speed Pro Speed Pro Piston Forged 4.280" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 29.4 cc AK113112S and rear of the helmetFully 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 micro finished 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.