Thread: Header and manifold Thread

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  1. #241 Re: Header and manifold Thread 
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    Speed Daddy's are a lot EASIER than most as long as you get the clamps and use the copper RTV. I had mine on and off the car twice in an evening with a C body car.
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  2. #242 Re: Header and manifold Thread 
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    but im a W-Body.
    Would there be any extra cutting and stuff that a shop would need to do?
    plus the problem is i need a retune then, and theres like no one around here who can do it.
    and ive messaged Overkill and no response so lol.
    I dont mind paying them to retune but if i cant even get someone to do it, then i wont do headers. Just 2.5" magnaflow exhaust setup.
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  3. #243 Re: Header and manifold Thread 
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    no extra cutting and welding if you go catless. otherwise with an aftermarket cat it could slip on and clamp with minor effort. It could even end up bolting directly to a stock catback if you measure twice and cut once. There is no need for a shop to do any of this work if you have a decent set of sockets, wrenches, a jack and a set of jackstands.

    Almost any off the shelf tune can disable the cat diagnostic test for 01+ vehicles.

    Will (Overkill) pops on from time to time. it may take a bit but he will get back to you.
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  4. #244 Re: Header and manifold Thread 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    adding headers, does NOT require a tune.

    you are just unlocking more by adding headers, so that way a tune can be used better.

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  5. #245 Re: Header and manifold Thread 
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    Quote Originally Posted by Fivefingerdeathpunch View Post
    adding headers, does NOT require a tune.

    you are just unlocking more by adding headers, so that way a tune can be used better.
    there is a good chance that even with an aftermarket cat an 01+ vehicle may get stuck in a diagnostic loop of sorts if it does not see an adequate response when it runs a self check on the cat. if you have no cat the car will be stuck pig rich and even if you have some aftermarket cats because they are less efficient it may cause the same condition.

    A tune is certainly recommended to disable this diagnostic test.
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  6. #246 Re: Header and manifold Thread 
    The mod from over yonder TheOtherNick's Avatar
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    Except you can not disable the test......
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  7. #247 Re: Header and manifold Thread 
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    lolwut?
    Last edited by fubar569; 09-13-2011 at 12:39 AM.
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  8. #248 Re: Header and manifold Thread 
    The mod from over yonder TheOtherNick's Avatar
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    you cant with hptuners and as far as I know you cant with dhp.
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  9. #249 Re: Header and manifold Thread 
    SE Level Member elhomero's Avatar
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    I'm probably gonna get laughed at but I'm gonna have to ask this.

    I want to install headers in my car but NJ has those California low emission laws too. If I got headers install would my car fail emissions (I'm going to keep the catalytic converter) even if it doesn't throw out any codes?
     

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  11. #251 Re: Header and manifold Thread 
    GXP Level Member txslow6's Avatar
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    Quote Originally Posted by elhomero View Post
    I'm probably gonna get laughed at but I'm gonna have to ask this.

    I want to install headers in my car but NJ has those California low emission laws too. If I got headers install would my car fail emissions (I'm going to keep the catalytic converter) even if it doesn't throw out any codes?
    If the inspector is anal enough and there's no sticker that says it's emission compliant then chances are you will fail. Then again most inspectors aren't that anal and will just check for a cat.

    TOGS include a sticker with there headers. No sure about the cheap ones like Speed daddy etc.
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  12. #252 Re: Header and manifold Thread 
    Moderator dsmuts's Avatar
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    Quote Originally Posted by txslow6 View Post
    If the inspector is anal enough and there's no sticker that says it's emission compliant then chances are you will fail. Then again most inspectors aren't that anal and will just check for a cat.

    TOGS include a sticker with there headers. No sure about the cheap ones like Speed daddy etc.
    Speed daddy's don't
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  13. #253 Re: Header and manifold Thread 
    GXP Level Member coolone's Avatar
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    Ok, I'm liking the Pace Setters and want to keep the Stock exhaust after the cat... Anyone here can relate their experience on the install and list all the pieces I would need. I would rather use the step s/s step clamps than weld if that's possible.

    I appreciate any suggestions and info.
    Thanks
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  14. #254 Re: Header and manifold Thread 
    SE Level Member Ramfett's Avatar
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    Quote Originally Posted by fubar569 View Post
    there is a good chance that even with an aftermarket cat an 01+ vehicle may get stuck in a diagnostic loop of sorts if it does not see an adequate response when it runs a self check on the cat. if you have no cat the car will be stuck pig rich and even if you have some aftermarket cats because they are less efficient it may cause the same condition.
    I'm wondering, is there any merit to this statement? I'm shopping for a 3" cat to add to the SD's I bought. Would say, a 3" magnaflow as opposed to stock really have potential to cause such problems?
     

  15. #255 Re: Header and manifold Thread 
    DUI BABY Bio248's Avatar
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    a 3" high flow cat is most likely going to set a P0420 code.
     

  16. #256 Re: Header and manifold Thread 
    SE Level Member Ramfett's Avatar
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    Considering I need to add a cat, what's the best solution to avoid the code while still getting performance out of my mods? Should I just have an OEM 2.5" cat welded in? Or, if I find something close to stock performance in a 3" size, would that work better?

    What kind of difference would the cat make in the performance?
     

  17. #257 Re: Header and manifold Thread 
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    2.5" cat is fine, that is what was on my car. the cat won't make a lot of difference in performance, especially being n/a.
     

  18. #258 Re: Header and manifold Thread 
    SE Level Member Ramfett's Avatar
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    Okay, cool. I sort of figured as much about being N/A. Thanks a lot, I really appreciate the info!
     

  19. #259 Re: Header and manifold Thread 
    SE Level Member jaked1985's Avatar
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    Lots of good info here, reading and reading till my eye balls feel like they're gona fall outta muh head!

    This is what I'm looking at,
    If I buy these, STAINLESS RACING MANIFOLD HEADER/EXHAUST GRAND PRIX/GTP/REGAL/IMPALA/MONTE CARLO | eBay

    Is it worth the $$ to buy this to elim the cat? Or would I be better off taking it in and fabbing something?
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    I know I'll need the band clamps... thank god for napa.. last time I asked for them at advanced the guy handed me a hose clamp.. As well as rtv and a little bit of hope.
     

  20. #260 Re: Header and manifold Thread 
    GTP Level Member biggt's Avatar
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    Quote Originally Posted by Bio248 View Post
    a 3" high flow cat is most likely going to set a P0420 code.
    and why is that? i have that code and i had no idea that was the problem... is there a way to disable it?
    02 SilverMist GT L67 SWAPPED
    Quote Originally Posted by RedDawnGXP View Post
    Yeah plus he has a lot of weight reduction with the clear corner lights.
     

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