Speed Pro Speed Pro Piston Forged 4.150" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 6.7 cc Thermostat Housing Spacer 050" Thick 6061 Alum Frame

050" Thick 6061 Alum Frame

090 tig welded aluminum

1998-2004 Ford Mustang

Bushings can be used to advance the cam for increased low-end torque and mid-range horsepower

Speed Pro Speed Pro Piston Forged 4.150" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 6.7 cc Thermostat Housing Spacer 050" Thick 6061 Alum FrameFully 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.