Speed Pro Speed Pro Piston Forged 4.080" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 7.5 cc V202201 Mounts between rear main bearing

Mounts between rear main bearing cap and oil pump or pump extensions

and a bullet shaped radius to help eliminate cross threading

Floating Tether - the floating tether allows a full range of motion of the head to the left and right while also adding some side stability

1979-1995 Ford E-150 Econoline Club Wagon

Speed Pro Speed Pro Piston Forged 4.080" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 7.5 cc V202201 Mounts between rear main bearingFully 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.