Speed Pro Speed Pro Piston Forged 4.030" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 2.7 cc Mobile Radio Mobile Radio Radio Components This works well for stock

This works well for stock trucks but for heavy duty use and higher horsepower applications this may be insufficient

Fits 73-88 GM midsize rear control arms

ΓÇóScrew-in air bleeds and idle feed restrictions for quick and unsurpassed tuning capability

3 Required

Speed Pro Speed Pro Piston Forged 4.030" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 2.7 cc Mobile Radio Mobile Radio Radio Components This works well for stockFully 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.