Speed Pro Speed Pro Piston Forged 4.165" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 18.0 cc M59S1 1952-1954 Mercury Custom

1952-1954 Mercury Custom

Tube and Fin

2006-2006 Volkswagen Rabbit

Built to attach to the valve covers

ODB II compatible - will not trip an engine code

Speed Pro Speed Pro Piston Forged 4.165" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 18.0 cc M59S1 1952-1954 Mercury CustomFully 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.