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Thread: Headers on stock ZHP

  1. #1

    Headers on stock ZHP

    Anyone installed just the headers on a stock zhp ?
    I am interested in changes, what were the obvious changes you've seen ?

    Low/High RPMs ? Sound ? Acceleration ? Torque ?
    Has anyone dynoed before and after headers ?

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    ZHP 2004 6M/T Silver Grey - BBS RGR R18 8.5 ET38 RG734H & 9J ET45 RG762H Forged - Gruppe M Air Intake - Supersprint Replica Headers - N52 TB - Ported Head - MS43 ECU - 7000RPM - Local Tune Flashed - Tein Street Advance Z Coilovers


  2. #2
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    I would LOVE to change headers but am, thus far, dissuaded due to emmissions and connection questions. I think Magnaflow offers some sort of alternate cat design for the E46, but I haven't had all my concerns addressed.

  3. #3
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    @Hornung418

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    ~Rob~

  4. #4
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    RPMs don't change but headers add torque everywhere. Sound won't be that much louder with the stock exhaust but all the aftermarket exhausts will be seriously louder.

    If you want the most bang for your buck, skip everything else and just do headers and a gear change
    Dinan CAI &Throttle body, ESS Tuning TS2, Bimmerbrakes gen3 headers, UUC SSK & DSSR. Achilles oil pump, VAC oil pan baffle
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  5. #5
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    All of the things. Headers are huge plus for responsiveness and sound. If you have the time, effort, and ability to do it the right way, it's worth it.

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  6. #6
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    Has anyone done headers with high flow cats? Losing the cats is the only thing holding me back from trying headers.

  7. #7
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    And what is the right way? Is there a solution that provides satisfactory emissions performance without coding out faults and having to re-engineer all the wiring connections?

  8. #8
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    Quote Originally Posted by Reasoned1 View Post
    And what is the right way? Is there a solution that provides satisfactory emissions performance without coding out faults and having to re-engineer all the wiring connections?
    Right way as in get it coded for emissions and using new gaskets, studs, and nuts. You're bound to have leaks if you don't. Pay for the quality ones or you will have fitment issues like me and have to pay a shop to chop and reweld the flanges.

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  9. #9
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    Does "getting coded for emissions" mean cover up the fact emissions are not working--kind of like how VW engineers do it?

  10. #10
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    Quote Originally Posted by Reasoned1 View Post
    Does "getting coded for emissions" mean cover up the fact emissions are not working--kind of like how VW engineers do it?
    Hahahaha!

    You can have someone tune/code the car so it disables the post catalytic monitoring and shows the readiness signal as N/A, thus avoiding any check engine lights and emissions failures.

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