Speed Pro Speed Pro Piston Forged 4.154" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 21.0 cc Helmet Blower Blower Filter with 92mm EFI Plenum Top

with 92mm EFI Plenum Top : Height - 8

Great for racing

It is drilled to reduce weight and is available with a black anodized finish or bare aluminum

Will not conflict with existing transmission tuning

Can be used to trigger popular TBI fuel injection systems

Speed Pro Speed Pro Piston Forged 4.154" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 21.0 cc Helmet Blower Blower Filter with 92mm EFI Plenum TopFully 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.