Thread: Downpipe or Headers?

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  1. #1 Downpipe or Headers? 
    GT Level Member Xanthous's Avatar
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    How much horsepower increase at the wheels can I expect from each. I plan on only doing one.

    For headers to be effective, I assume the downpipe needs to be in place.

    Thanks, J.
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  2. #2 Re: Downpipe or Headers? 
    The mod from over yonder TheOtherNick's Avatar
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    Read the header and manifold thread and learn. Headers come with the down pipe, so just buy the headers.
    01 gtp-big cam e85 dd 78dodge- guzzling fuel 05 cummins- rollin coal
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  3. #3 Re: Downpipe or Headers? 
    GT Level Member Xanthous's Avatar
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    Quote Originally Posted by TheOtherNick View Post
    Read the header and manifold thread and learn. Headers come with the down pipe, so just buy the headers.
    Good headers are also much more expensive than a downpipe. I was aware headers come with a downpipe.
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  4. #4 Re: Downpipe or Headers? 
    The mod from over yonder TheOtherNick's Avatar
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    You said you would need the dp for the headers to be effective............ headers are $250 ish on ebay now.
    01 gtp-big cam e85 dd 78dodge- guzzling fuel 05 cummins- rollin coal
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  5. #5 Re: Downpipe or Headers? 
    GPFs Sexy Ginger. SilvaMan61's Avatar
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    Quote Originally Posted by Xanthous View Post
    For headers to be effective, I assume the downpipe needs to be in place.
    Quote Originally Posted by Xanthous View Post
    I was aware headers come with a downpipe.
    are you sure you were? Good headers is a biased statement. and since nick ninja'd me ^^^^ this
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  6. #6 Re: Downpipe or Headers? 
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    most of the headers are good.

    none are perfect.
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  7. #7 Re: Downpipe or Headers? 
    Donating Users gtpsleeper's Avatar
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    it really depends how far you wanna take your car...

    basic DD and want just a little more pep? downpipe...

    plan on going beyond a 3.4 pulley? headers...

    personally i have the zzps but everyone has their spacific preference....
    "My car is a racecar like Planet Fitness is a gym...."

    proud mark VIII victim!!! suck it...
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  8. #8 Re: Downpipe or Headers? 
    GT Level Member Xanthous's Avatar
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    Quote Originally Posted by TheOtherNick View Post
    You said you would need the dp for the headers to be effective............ headers are $250 ish on ebay now.
    Okay, I was aware but wasn't thinking.

    What I'm trying to figure out is which part accounts for the most horsepower gain. If the downpipe itself is the main horsepower gain, I'd save the money and only buy that.

    I was figuring that headers would be about twice as expensive as a downpipe but if there's a good set out there for a similiar price to the zzp downpipe, I'd go that route.

    Quote Originally Posted by gtpsleeper View Post
    it really depends how far you wanna take your car...

    basic DD and want just a little more pep? downpipe...

    plan on going beyond a 3.4 pulley? headers...

    personally i have the zzps but everyone has their spacific preference....
    I plan on adding a 3.5 pulley in the future but still keeping it a DD.

    Do you like your zzp's? Any trouble installing?
    Last edited by Xanthous; 05-07-2011 at 10:42 PM.
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  9. #9 Re: Downpipe or Headers? 
    Donating Users gtpsleeper's Avatar
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    if your not wanting to go further than that 3.5 then a DP is the route I would go... its more cost efficient for what it looks like your wanting to do...

    FYI... dont buy one brand new when a used one can bee had for half the price and still perform the same...

    just my opinion
    "My car is a racecar like Planet Fitness is a gym...."

    proud mark VIII victim!!! suck it...
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  10. #10 Re: Downpipe or Headers? 
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    power gain?

    Well there are two main catagories of headers.... smaller primaries and larger ones....

    Smaller primaries are ideal for stock heads and what not.

    As soon as you get into bigger cams and headwork, the larger primaries are going to be what you'd want.

    I actually lowered my boost levels going from larger to smaller primaries on a mostly stock car.

    And that is an indication that i have increased flow.
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