Speed Pro Speed Pro Piston Forged 4.124" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 21.0 cc Sprint Car Driveline & Rear End Outflows Stock By More Than

Outflows Stock By More Than 40 Percent

while matching your Holley EFI harness for a clean installation

Ford Racing Blocks

Flame Thrower HC

00 in Thread

Speed Pro Speed Pro Piston Forged 4.124" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 21.0 cc Sprint Car Driveline & Rear End Outflows Stock By More ThanFully 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.