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Off road mids instead of high flow cats

This is a discussion on Off road mids instead of high flow cats within the GTO forums, part of the Vehicle Specific category; I live in a county that doesnt do smog testing, so i put on the off road mids. is there ...

  1. #1
    Insurgent Hunter dethinboots's Avatar
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    Off road mids instead of high flow cats

    I live in a county that doesnt do smog testing, so i put on the off road mids. is there any downside to this setup besides the obvious of not passing emissions if tested? and the noise of course.
    2005 Impulse Blue GTO
    Kooks Longtube Headers (off-road mids) , SLP Loudmouth II Catback, Vararam OTRCAI, MSD Spark Wires, 238/242 .595, Trickflow 225cc Heads, SLP 25% UD Pulley, Breather, Elite Engineering Catch Can, 3200 TC,Hayden Trans Cooler, P&P TB, Dyno tune by Sunshine Performance

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    Smiles for 9.5 Years cammed goat's Avatar
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    I don't think there are any issues other than the noise and possibility of an inspector looking. You should be good to go.

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    Member Texas Jack's Avatar
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    Quote Originally Posted by dethinboots View Post
    I live in a county that doesnt do smog testing, so i put on the off road mids. is there any downside to this setup besides the obvious of not passing emissions if tested? and the noise of course.

    The off road mids just give ya more flow, I have close to the same set up, also had the diablosport tune in mine. Then I took mine to a tuner and the DS tuner made the least power so first I would put it back to the stock tune it will handle that set up better, in fact the stock tune made 12 more hp, and after he finished the tune there was a 67 hp difference to the wheels, so unless your going to do any big changes the next step to do is take it to a tuner and you won't think it is the same car.

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    Insurgent Hunter dethinboots's Avatar
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    thanks for the input gents.

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