Speed Pro Speed Pro Piston Forged 4.154" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 21.0 cc R090003 NOTE: Modification to rocker arm

NOTE: Modification to rocker arm stud boss is required when replacing OE pressed-in rocker arm studs

Ford Small Block 28 oz/in balance 164 tooth

1956-1960 Ford Sunliner

7 in Stroke

you know you are driving with excellence at your fingertips

Speed Pro Speed Pro Piston Forged 4.154" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 21.0 cc R090003 NOTE: Modification to rocker armFully 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.