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Will i pass emissions?

This is a discussion on Will i pass emissions? within the External Engine forums, part of the LSx Technical Help Section category; If i get tsp catted y with the high flow magnaflow cats, will i pass emissions if i'm not throwing ...

  1. #1
    Rice Hungry GottaHaveLS1's Avatar
    Join Date
    Oct 2005

    1999 Trans Am M6

    Will i pass emissions?

    If i get tsp catted y with the high flow magnaflow cats, will i pass emissions if i'm not throwing any codes? I'm just curious cuz a buddy of mine told me his friend had high flows on his stang and he failed.
    Last edited by GottaHaveLS1; 05-24-2006 at 04:53 PM.
    1999 Trans Am M6
    SLP Short Throw, Lid and CAI, BMR STB and SFC, UMI PHB, Pacesetter LT's and ORY, Magnaflow Catback, DMH 3" E-Cutout, LS7 Clutch, Motive 4.10, 160 T-Stat, MSD, !AIR, !EGR, 17x9.5 Chrome C6's wrapped in Hankook 275/40/17

    Tuned at Mongillo Motors in New Haven, CT

  2. #2
    Junior Member RrCoX22's Avatar
    Join Date
    Sep 2005
    KillaKaliNaziFornia, CA
    its a hit or miss with the tech. if you move the stock cats from their stock locations you will fail... i have hi-flow cats and they aren't in the stock locations but i passed with flying colors

  3. #3
    It also depends on how the test is done. Here in NY they don't dyno and sniffer test anything newer than 96 anymore. They hook your car up to a diagnostic computer, and run a test on it. If your car throws any codes or hasn't completed any of it monitors, you fail. So if you get a guy that doesn't care, you could have no cats and still pass. But if they still do a visual inspection for emission controls you'd need the high flows.

  4. #4
    Senior Member INMY01TA's Avatar
    Join Date
    Jan 2006

    2001 Trans Am (sold)

    I've passed emissions twice with Mac mids, Ory and a Borla catback. (Once with the 224 cam loping). No visual, no codes, no problem.

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