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08 silverado 5.3 mods

  1. 08LTZsilverado5.3
    08LTZsilverado5.3
    i have a 08 ltz z71 5.3 ive got shorty headers edge programmer flowmaster 1 chamber mufflers two of them air intake throttle body spacer im thinking of putting a 08 c6 vette intake manifold on it my estimated numbers after all these mods plus saying the intake manifold were to add atleast 10 hp my estimated number is 378 rear wheel hp does this sound correct or does anyone have any input about putting the c6 intake manifold on the truck ?
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