Speed Pro Speed Pro Piston Forged 4.000" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 6.1 cc Hastings not limited to the SAE

not limited to the SAE sized wire used in the production of many of the springs currently on the market

The LED over the power connections will come in handy for troubleshooting as it flashes only when the coil fires

1" or 1-1/2" raised steel mounts are 1/4" thick and slotted for easy installation

Allows Jet Changes

Ford Fullsize SUV 1973-75

Speed Pro Speed Pro Piston Forged 4.000" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 6.1 cc Hastings not limited to the SAEFully 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.