Thread: Stock downpipe

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  1. #1 Stock downpipe 
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    I'm looking for a factory down pipe with a good cat for my wife's 04 GTP. If I don't find one within about a week or so it's going catless with a zzp tune, so help me save my money now!
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  2. #2 Re: Stock downpipe 
    GTP Level Member chris99gtp's Avatar
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    will one from a 01 fit?
    99 gtp- Burnt and gone
    01 gtp- Here to stay-3.4, SD Headers, AL104's HAI, Overkill PCM, SD Hood
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  3. #3 Re: Stock downpipe 
    GTP Level Member buickman104's Avatar
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    Should fit from my understanding the biggest difference between the 97-03 and 04-08 is that the downpipe doesn't have the U bend on the newer models.
    2000 Bronze Metallic GTP
    Power :Gen V, 3.6 pulley, 3 inch down pipe, Power log, FWI,and DHP Power Tuner,
    Handling: Vogtland Springs, GMPP sway bars, STBS, 18" Konig backbone, CTS-V Front brakes and GXP rear brakes
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  4. #4 Re: Stock downpipe 
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    I actually don't think they will fit. I'm like 95% sure they changed the rear flange as well. And the actual converter is much higher on the down pipe and not horizontal like the 97-03 cars
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  5. #5 Re: Stock downpipe 
    SE Level Member DCGTP's Avatar
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    i have an 05 stock dp with good cat. whats your zip, will figure shipping tomorrow
    Overkilled, AL605s, 180 T-stat, Cone Intake, Cross drilled & Slotted Rotors, f-body upgrade, poly upper mounts, shorter dog bones,
    factory nav, 2x12s in the trunk, interior LED swap, all 5000k HIDs, red halo's in upper grille, tinted tails and reverse lights, de-badged, XM to line in conversion
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  6. #6 Re: Stock downpipe 
    GTX Level Member OH4CompG's Avatar
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    04+ will not fit earlier years, but earlier years will fit 04+. Been there and bolted that up
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  7. #7 Re: Stock downpipe 
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    Thanks for the replies guys. Wags81 is sending me a converter.
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