Speed Pro Speed Pro Piston Forged 4.040" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 6.1 cc RRP2EX 1977-1980 Pontiac Bonneville

1977-1980 Pontiac Bonneville

(1) #6 Fuel Return and (1) #6 Rollover Vent Valve

Block Adapter Plates

NOCO Battery Chargers and Accessories

Speed Pro Speed Pro Piston Forged 4.040" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 6.1 cc RRP2EX 1977-1980 Pontiac BonnevilleFully 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.