Speed Pro Speed Pro Piston Forged 4.154" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 21.0 cc Shutoff Valve Fits Most Domestic Stock Wheels

Fits Most Domestic Stock Wheels (GM & Ford OEM Wheels)

1100-1200 PSI

DIRECT BOLT ON FOR FACTORY REAR UPPER CONTROL ARMS

Compatible exclusively with the M8 Carbon and M8

Speed Pro Speed Pro Piston Forged 4.154" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 21.0 cc Shutoff Valve Fits Most Domestic Stock WheelsFully 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.