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(Quarter panels listed in the greenhouse-style ABC section are a different configuration
preventing engine failure
tight tolerance TIR (Total Indicated Runout) deviation from datum line (USA)
Not a generic replacement that does not fit like some others as this heater core is made to our specifications
Pontiac 326-455
Speed Pro Speed Pro Piston Forged 4.155" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 18.0 cc 24-CHL-N-11 (Quarter panels listed in theFully 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.
