Speed Pro Speed Pro Piston Forged 4.040" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 6.1 cc Helmet Forced Air Inlet throttle bodies and includes a

throttle bodies and includes a knock-out in the base for use with a crankcase ventilation adapter

070" Spring Wire

King Racing Products Torque Ball Assembly

These features translate into the lowest possible moment of inertia (MOI) and deliver a performance increase you can feel on the track

Connector fits through 1-1/4" hole

Speed Pro Speed Pro Piston Forged 4.040" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 6.1 cc Helmet Forced Air Inlet throttle bodies and includes aFully 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.