Thread: Exhaust question

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  1. #1 Exhaust question 
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    Hey everyone, I have a bit of an odd question. Is there any difference in the v6 exhaust from the v8?

    The reason I ask, I have a friend in PA and his 06 GXP has failed inspection because of a couple of exhaust issues. Over the years he did something to the resonator and swapped out to Flowmasters as well so itís hard to say what shape the exhaust system as a whole is in as I havenít seen it in over a year. Dude was like a brother to me growing up and still is to this day. Anyway I sold my house a couple of months back so I have a little cash I can spare and I want to help him get his car back on the road so he and his wife donít have to share hers anymore, but my knowledge of this platform is seriously lacking. I tried to find a catback system (even a stock kit) just because I donít know what all is rusted and needs to be replaced so I was gonna replace it all but the only thing I could come across for the GXP was a $1000 Magnaflow unit and that wonít be happening.

    My next option is to find each individual piece and make my own kit I suppose, but I did see a couple of kits for the 3.8 for the $300-$400 range so I figured if I could use that and swap in a couple of better sounding mufflers to give it the rumble his used to have Iíd be set.

    Currently Iím in Northern VA and heís like a half hour outside of Harrisburg PA so I was hoping to just get everything I would need, then take it up there to get it all installed on a Saturday one day when heís off next month and not have to make multiple multi-hour trips.

    Thanks
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  3. #2 Re: Exhaust question 
    GT Level Member mguzzo's Avatar
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    my question would be to ask what specifically failed PA inspection before you start throwing parts at it.

    if you wanted to do the whole system, start checking rock auto. You could find a new cat / downpipe specific to the GXP and then a catback from any other W body with dual exhaust.
    --
    Current '98 GTP Coupe: Still stock and rust free. That will change.
    Old '98 GTP Coupe: VS Cam, 3.0, S2IC, 42.5#, TOGs, N*/LQ4, Corsa. it once ran a 13 flat
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  5. #3 Re: Exhaust question 
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    The only practical difference is the GXP has four tailpipes instead of two, which makes it sound much better than the other LS4s and that's it.

    As far as function and inspections, the above is exactly correct.
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