Thread: 3" DP to stock manifold

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  1. #1 3" DP to stock manifold 
    GT Level Member K Kraziee's Avatar
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    Ik this has been asked a million times, but I want to be 100% sure before I buy. Does a 3" DP connect to the stock manifold? Ik they decrease to 2.5" at the other end to fit the resonator. Thanks for your input. BTW it's a pacesetter DP that came with there header's if that makes a difference.
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  2. #2 Re: 3" DP to stock manifold 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    Yep. Bolts directly to the stock catback.
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
    Projects: 86 Monte Carlo SS / 98 Sonoma / 74 Honda CB750
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  3. #3 Re: 3" DP to stock manifold 
    GTX Level Member OH4CompG's Avatar
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    I'm confused, are you going to try to use a downpipe from a set of headers to bolt to your stock manifolds? That won't work at all.
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  4. #4 Re: 3" DP to stock manifold 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    After reading ^ and re reading the op I am also confused.
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
    Projects: 86 Monte Carlo SS / 98 Sonoma / 74 Honda CB750
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  5. #5 Re: 3" DP to stock manifold 
    Turbo is the way to go. BillBoost37's Avatar
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    I was confused on the first reading.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  6. #6 Re: 3" DP to stock manifold 
    GT Level Member K Kraziee's Avatar
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    The DP is from a set with pacsetter header's. I dont have the headers, just the downpipe. I can get a pic if you want.
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  7. #7 Re: 3" DP to stock manifold 
    Turbo is the way to go. BillBoost37's Avatar
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    No that downpipe will not connect to your stock rear exhaust manifold.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  8. #8 Re: 3" DP to stock manifold 
    GT Level Member K Kraziee's Avatar
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    Ok thanks. Another quick question, if I buy Speed Daddy or equivalent header's, can i still use my stock cat?
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  9. #9 Re: 3" DP to stock manifold 
    Turbo is the way to go. BillBoost37's Avatar
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    You could if you put a bottleneck into the piping with a 3" to 2.25" reducer and then did other nonsense to enlarge it back to 3". Personally though, it's easier to get a 3" cat.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  10. #10 Re: 3" DP to stock manifold 
    GXP Level Member Grimsin's Avatar
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    Yes, u will need a 3" pipe that reduces to 2.25" , im going to use my stock cat with my new SD headers
    Edit: bill beat me to it lol
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  11. #11 Re: 3" DP to stock manifold 
    GT Level Member K Kraziee's Avatar
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    Ok now one more question, I promise it's the last one. Will ZZP's 3" DP bolt to my stock manifold and resonator? The DP will be my first exhaust mod.
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  12. #12 Re: 3" DP to stock manifold 
    Turbo is the way to go. BillBoost37's Avatar
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    Yes..however they like to leak. So RTV the hell out of your new gasket to seal it up.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  13. #13 Re: 3" DP to stock manifold 
    GT Level Member K Kraziee's Avatar
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    Okey dokey, is there a better DP you would suggest?
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  14. #14 Re: 3" DP to stock manifold 
    Turbo is the way to go. BillBoost37's Avatar
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    Quote Originally Posted by K Kraziee View Post
    Ok now one more question, I promise
    I'm sorry.. no more questions!

    hahahahahaha
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  15. #15 Re: 3" DP to stock manifold 
    GT Level Member K Kraziee's Avatar
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    Ughhhh lol well il probly try the ZZP DP i guess.
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  16. #16 Re: 3" DP to stock manifold 
    Turbo is the way to go. BillBoost37's Avatar
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    You were the one that promised..lol

    I dunno of any better DP's.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  17. #17 Re: 3" DP to stock manifold 
    GT Level Member K Kraziee's Avatar
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    Ik ik, I'l prob go for the ZZP. I should probly start pb'ing my bolts lol
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