Speed Pro Speed Pro Piston Forged 4.124" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 21.0 cc Tire Dressing Y-type or Individual shoulder harnesses

Y-type or Individual shoulder harnesses

Gauge Adapter

Control Arm Shims

Knitted from extra-plush Nomex®

and other air and fuel delivery system items

Speed Pro Speed Pro Piston Forged 4.124" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 21.0 cc Tire Dressing Y-type or Individual shoulder harnessesFully 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.