Speed Pro Speed Pro Piston Forged 4.280" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 29.4 cc AK113112S Our patented gauge technology allows

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

1992-1993 Oldsmobile Achieva

Does not fit 1967 to 1969 Camaro's with air conditioning

Choose from 63- or 80-amp capacities

Speed Pro Speed Pro Piston Forged 4.280" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 29.4 cc AK113112S Our patented gauge technology allowsFully 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.