Speed Pro Speed Pro Piston Forged 4.124" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 38.3 cc Neck Roll Pre-bent 4-way stretch panels across

Pre-bent 4-way stretch panels across back

1966-1968 Ford GT40

1996-2000 Plymouth Breeze

1990-1990 Ford Bronco IIFits Ford

1984-1987 Pontiac Acadian

Speed Pro Speed Pro Piston Forged 4.124" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 38.3 cc Neck Roll Pre-bent 4-way stretch panels acrossFully 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.