Speed Pro Speed Pro Piston Forged 4.150" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 6.7 cc 11548 Designed to fit all 1958-86

Designed to fit all 1958-86 Small Block Chevy engines with perimeter bolt patterns

1982-1987 GMC Caballero

A full High Pressure bottle can typically last 2-3 race days or track days of tire work depending on the application

Chrome-moly billet steel rotors

Black zinc finish

Speed Pro Speed Pro Piston Forged 4.150" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 6.7 cc 11548 Designed to fit all 1958-86Fully 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.