Thread: New Downpipe installed

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  1. #1 New Downpipe installed 
    SE Level Member dhall9's Avatar
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    Got my new ZZP 3" Downpipe installed this morning. Here's a pic of the new one next to the factory one.



    It was a pretty easy install, bolted right up with no problems. Went for a test drive and was impressed with the added pick up and go.
    2002 GTP Coupe - Motosports CAI, 3" ZZP DP, GMPP sway bars, ZZP Front & Rear STB's, AL 104's, 180* Tstat
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  2. #2 Re: New Downpipe installed 
    The Blue One blueguy's Avatar
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    Got rid of that U-Bend AND stock DP...bet you had a pretty big SEG...nice
    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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  3. #3 Re: New Downpipe installed 
    SE Level Member dhall9's Avatar
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    I don't know what idiot came up with the U-Bend idea, surely someone had a better idea than restricting exhaust flow just so the O2 sensor could be mounted straight up and down. Especially on a supercharged engine.

    I was actually pretty impressed with the quality of the downpipe. Granted I didn't know what to expect, but when I opened the box I was like "damn, that is kick ass"
    2002 GTP Coupe - Motosports CAI, 3" ZZP DP, GMPP sway bars, ZZP Front & Rear STB's, AL 104's, 180* Tstat
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  4. #4 Re: New Downpipe installed 
    GTP Level Member superv6's Avatar
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    Yup. I loved the zzp dp. I went with the catless one. How does the cat one sound?
    2003 GTP- 180 tstat,tb spacer,flipped dogbones,dhp pcm,3"catless dp,plog,thrasher fwi,3.4 pulley,msd 8.5mm wires,autolite 104s----------best run so far:14.1 @97mph
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  5. #5 Re: New Downpipe installed 
    GXP Level Member boosting98's Avatar
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    how much gain are u guys experiencing w/ just a dp and the u bend delete?
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  6. #6 Re: New Downpipe installed 
    SE Level Member dhall9's Avatar
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    ZZP claims of 15HP and above

    ZZP's Downpipe page:
    ZZ Performance

    I only have access to a "seat of the pants" dyno, and I can tell for sure there is an increase in HP.
    2002 GTP Coupe - Motosports CAI, 3" ZZP DP, GMPP sway bars, ZZP Front & Rear STB's, AL 104's, 180* Tstat
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  7. #7 Re: New Downpipe installed 
    SE Level Member dhall9's Avatar
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    I couldn't tell a big difference in sound. Which is exactly what I wanted. I enjoy having a "sleeper".
    2002 GTP Coupe - Motosports CAI, 3" ZZP DP, GMPP sway bars, ZZP Front & Rear STB's, AL 104's, 180* Tstat
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  8. #8 Re: New Downpipe installed 
    GTP Level Member carl06GT's Avatar
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    how much did you pay for the downpipe with shipping if you dont mind me asking?
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