Speed Pro Speed Pro Piston Forged 4.040" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 5.4 cc Coil-In Cap NOTE: D-Ring pictured is not

NOTE: D-Ring pictured is not included

Dart's highly popular small-block Pro1 heads have been given the full Platinum treatment utilizing wet flow technology

Niterra North America

Holley 4160 / Quick Fuel Slayer Series

Gasket Valve Cover Bolts 5019 Chrome Plated - 1/4 in

Speed Pro Speed Pro Piston Forged 4.040" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 5.4 cc Coil-In Cap NOTE: D-Ring pictured is notFully 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.