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 Adds a dramatic amount of

Adds a dramatic amount of performance and durability to any vehicle

220" length

Short Throw Ratchet Action Reduces Shift Time

Roof is 49" long x 47" wide

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 Adds a dramatic amount ofFully 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.