Speed Pro Speed Pro Piston Forged 4.350" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 7.0 cc RG20001XS This kit is great for

This kit is great for asphalt racers when the rules allow driving an alternator off the 3rd member

Heat Screen can be used to protect areas where excessive heat can blister paint

Dana 60 / 61

400 in Stroke

Speed Pro Speed Pro Piston Forged 4.350" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 7.0 cc RG20001XS This kit is great forFully 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.