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  1. #1

    Default 3 cats on 12' sierra???

    Changing oil last night and noticed what looks to be like a 3rd cat. It's after the y pipe but before the muffler. Can anyone verify this for me? Thanks guys

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    Last edited by justaphase44; 02-18-2013 at 12:14 PM.

    2012 Sierra - 5.3 Z71 - Afe cai, Rhino bedliner, 20% tint all around and 10% brow, 6k hid lows and fogs, Magnaflow catback, tinted tails and front sidemarkers.

  2. #2

    Default

    resonator i think.....

    Alex


    2011 GMC Sierra SLE 5.3 Z71 4X4 Stealth Gray Metallic / 2004 Chevy Impala LS 3.8 Cappuccino

    Tow mirrors - Diablew Tuned - Flowmaster Regular 40 - Ready Lift 2.5' lift - BFG LT A/T K/Os - Carr Light Wing - TruckLite LED lights - Optima Red Top - 50% Front Window Tint - Line-X bedliner - Airaid MIT - Tekonsha P2 - ARS Billet Grill - Fia custom fit seat covers

  3. #3

    Default

    Yeah, went by muffler shop and guy said he had a 11' but his didn't have it on there. Don't know what gm has up their sleeve lol

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