Speed Pro Speed Pro Piston Forged 4.090" Bore 5/64 x 3/32 x 3/16" Ring Grooves - Minus 10.0 cc 41009010 Lower portion of net secures

Lower portion of net secures around a lower bar

Perfectly suited for use as a single stage control with user programmable set point adjustment by 10 RPM increments

Bolts to water pump attachment points and back of the alternator

higher flowing intake ports

Speed Pro Speed Pro Piston Forged 4.090" Bore 5/64 x 3/32 x 3/16" Ring Grooves - Minus 10.0 cc 41009010 Lower portion of net securesFully 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.