Thread: 2.5" vs 3" downpipe for GT

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  1. #1 2.5" vs 3" downpipe for GT 
    01GT guy
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    Default 06-30-2015
    I have a 2001 grand prix GT that needs a new catalytic converter. ZZP is out of 2.5" downpipes right now, and only the 3" is available. Should I just get the 3" or wiat for 2.5"?(don't really care about the price) Or is the 3" much louder than the 2.5"?
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  2. #2 Re: 2.5" vs 3" downpipe for GT 
    Fivefingerdeathpunch
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    Default 06-30-2015
    Go 3in.

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  3. #3 Re: 2.5" vs 3" downpipe for GT 
    EHB
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    Default 06-30-2015
    3 inch and no it won't be any louder
    2000 GTP - 3" Catted DP...ZZP Plog...9" Cone filter...Reptile pcm...3.4 pulley...AL104's
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  4. #4 Re: 2.5" vs 3" downpipe for GT 
    99GT2dr
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    Default 06-30-2015
    Why do 2.5" dp's even exist?
    '11 Suburban LTZ
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