Thread: 04+ exhaust on 97+gtp?

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  1. #1 04+ exhaust on 97+gtp? 
    GT Level Member xxburkettxx07's Avatar
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    Will the exhaust off a 04+gtp bolt right up to my 98 gtp?

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  2. #2 Re: 04+ exhaust on 97+gtp? 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    It'll fit, not sure if all hangers are in the same spot though.

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  3. #3 Re: 04+ exhaust on 97+gtp? 
    GT Level Member xxburkettxx07's Avatar
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    You would think if they made it the same to bolt up the hangers should be relatively close to

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  4. #4 Re: 04+ exhaust on 97+gtp? 
    Moderator dsmuts's Avatar
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    I pulled my corsa catback off a 99 and it went right on my comp g
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  5. #5 Re: 04+ exhaust on 97+gtp? 
    GT Level Member xxburkettxx07's Avatar
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    Nice thank you

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  6. #6 Re: 04+ exhaust on 97+gtp? 
    The Blue One blueguy's Avatar
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    The OEM hangers are in fact different.

    Been there, done that.

    You will need to remove one of the hangers on the Y on the '04+ catback so it doesn't rub on the body.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  7. #7 Re: 04+ exhaust on 97+gtp? 
    Moderator dsmuts's Avatar
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    The catback off my comp g went right on the 99 coupe I had.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  8. #8 Re: 04+ exhaust on 97+gtp? 
    GTX Level Member Travisgt2's Avatar
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    04+ don't have a u bend like the 97-03 do they?
    04 GT2: 180 t-stat, cold air intake, reptile tune, plog, hv3, gt1 cam, 90#springs, new push rods, new lifters, port polished heads, lim, uim and tb, 06 Impala brakes and steel brake lines. Cosmetic: black roof rails, under glow, Pontiac ground light, blue hud dic radio controls and cluster. To come custom hood.
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  9. #9 Re: 04+ exhaust on 97+gtp? 
    Moderator dsmuts's Avatar
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    that's the downpipe not catback
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  10. #10 Re: 04+ exhaust on 97+gtp? 
    GT Level Member xxburkettxx07's Avatar
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    Other than the one hanger needing removed on the y of the cat back, it will go right in place correct?

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  11. #11 Re: 04+ exhaust on 97+gtp? 
    The Blue One blueguy's Avatar
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    Quote Originally Posted by dsmuts View Post
    The catback off my comp g went right on the 99 coupe I had.
    Mine bolted up, yeah...but the hanger was still there. This was on an '05 supercharged car.

    Quote Originally Posted by Travisgt2 View Post
    04+ don't have a u bend like the 97-03 do they?
    The GXP does, in the downpipe. It's not near as bad as the '97-'03 ones.

    Quote Originally Posted by xxburkettxx07 View Post
    Other than the one hanger needing removed on the y of the cat back, it will go right in place correct?

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    Yes. You can use the factory gasket (a new one of course after you clean the matting surfaces)...Part #31605...O'Rielly's seems to be the only place that I can ever get them. AZ never even had them in the system. They just sold the manifold to downpipe gasket. If you haven't put a downpipe on the car, I'd tell you that now would be a super easy time to do so...especially with the old catback out...you can remove the old downpipe from under the car, bolt the new DP to the '04+ catback outside of the car...and then jack up the back of the car and slide it all in from underneath. I just did all this on my bucket '98. Got the DP close enough to the manifold and hung up the mufflers and used a jackstand to hold the middle of the exhaust up.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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