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  1. #1

    Default whats the difference between a.i.r. header and a non a.i.r. header?

    i wanna get ceramic coated headers for my 00 gmc sierra 5.3l. there is two types offered by edelbrock one has a.i.r. and the other doesn't. how can i tell what i have so i can order the correct ones. i know for a fact that my truck was made in Canada and it has EVAP emissions.

    non air
    http://www.jegs.com/i/Edelbrock/350/65002/10002/-1

    air
    http://www.jegs.com/i/Edelbrock/350/65012/10002/-1
    2000 GMC Sierra 1500
    Z71
    Ext. Cab, Short box
    5.3l Vortec
    Volant CAI with Granatelli MAF Sensor
    Maganflow high flow cats and flowmaster 2.5in cat back duals with 4X18in tips.
    Ziebart bed liner

    SOON!!
    Edelbrock ceramic coated headers
    Torsion keys
    Ziebart frame

  2. #2

    Default

    A.I.R. stands for Air Injection Reaction - basically, and air-pump. The A.I.R. headers have fittings on the #2 and #3 cylinders for the air pump to inject outside air into the exhaust stream to help decompose the pollutants.

    If you don't have an AIR pump and metal tubes leading into your existing exhaust manifolds, then you don't need the A.I.R. headers.
    Kirk
    Norwalk, CT

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