Speed Pro Speed Pro Piston Forged 4.390" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 22.0 cc RK-R1 All BBK Power Plus throttle

All BBK Power Plus throttle bodies offer OEM drive ability but with up to 30% improved airflow for improved horsepower

Smooth top breather

Adds a dramatic amount of performance and durability to any vehicle

Manley Sportmaster connecting rods are forged from aircraft quality 4340 steel

1975-1978 GMC C25 Suburban

Speed Pro Speed Pro Piston Forged 4.390" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 22.0 cc RK-R1 All BBK Power Plus throttleFully 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.