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Installing headers

This is a discussion on Installing headers within the V6 forums, part of the Vehicle Specific category; So I finally got my money together and ordered some Pacesetter headers and I was wondering if removing the cats ...

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    Member transamgirl89's Avatar
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    Installing headers

    So I finally got my money together and ordered some Pacesetter headers and I was wondering if removing the cats would be worth it or would it harm my car as far as back pressure. Also would I need new 02 sensors or 02 extenders with my setup? I have an H pipe with Flowmaster 40 series exhaust.

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    Veteran 0rion's Avatar
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    removing the cats won't hurt....it'll actually help. I'm not sure on the 6ers about the extensions but I'd almost bet you'll need some. Your stock O2's should be fine but the harness will most likely be too short. Hopefully someone familiar with headers on the 6's will chime in but I bet you're going to need extensions.

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    Member transamgirl89's Avatar
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    I was gonna take some pics of the underside and post them so everyone will have an idea what I'm dealing with.

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    Member transamgirl89's Avatar
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    I REALLY need some answers because I'm installing them this weekend.

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    Something Diabolical... chuckie669's Avatar
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    Find out from your auto parts dealer if the o2's are different part number on the 6 vs 8. For some reason I have the feeling the o2's could be the same.

    If they are the same part, get the vette 02's which are longer. I wrote the pn in a header install sticky thread somewhere. Think it was Bosch 17111?

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    Veteran 0rion's Avatar
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    bosch 13111 is the part number for the vette rears that have the longer harness.

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    Something Diabolical... chuckie669's Avatar
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    Thx Orion. It's been awhile.

    Anyways just check the part number for your yr between the v6/v8 from whichever parts store you visit.

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    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    *Sigh*

    The 3800 only has one rear 02 and one cat..

    Even IF you for some reason had 2 cats, you still only have one provision on the harness for the lone rear 02..

    That's how they (3800) f-body were ALL make..

    The headers will either have bungs for the front (2) 02's or they will have to be welded in..

    Disconnecting the rear 02 or having it turned out will not harm anything nor effect performance..

    The rear 02 code consists of a catalyst efficiencey an has no bearing on anything for engine operation..
    Last edited by Smittro; 02-18-2011 at 12:09 PM.
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    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    Quote Originally Posted by Smittro View Post
    *Sigh*

    The 3800 only has one rear 02 and one cat..

    Even IF you for some reason had 2 cats, you still only have one provision on the harness for the lone rear 02..

    That's how they (3800) f-body were ALL make..

    The headers will either have bungs for the front (2) 02's or they will have to be welded in..

    Disconnecting the rear 02 or having it turned out will not harm anything nor effect performance..

    The rear 02 code consists of a catalyst efficiencey an has no bearing on anything for engine operation..
    3800 factory heads produce enough back presure themselves, headers will help get rid of some of it..

    It will need tuned after the header install as well..

    The 3800 factory tune is not setup for top end..

    You will gain top end with a tune..

    Headers without a tune will actually hurt you some..
    Last edited by Smittro; 02-18-2011 at 12:20 PM.

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