1 7/8th vs 1 3/4" headers - Page 2
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2004-2007 Cadillac CTS-V Performance Mods Discussion, 1 7/8th vs 1 3/4" headers in Cadillac CTS-V Series Forum - 2004 - 2007; Originally Posted by CTS-Voodoo I got mine new with cats and all associated hardware, gaskets, connectors for the o2s, etc ...
  1. #16
    smashn808 is offline Cadillac Owners Fanatic
    Automobile(s): 2009 Radiant Silver CTS-V, 6MT
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    Re: 1 7/8th vs 1 3/4" headers

    Quote Originally Posted by CTS-Voodoo View Post
    I got mine new with cats and all associated hardware, gaskets, connectors for the o2s, etc for 800 bucks. My advice, wait till the wet season starts in the rest of the world and youll see a whole lot of Vs attempting to "mate" with large inanimate objects. Headers will be available then.
    That's a good deal. I'm always a day late when they pop up for sale in the classifieds.

  2. #17
    lubelizard is offline Cadillac Owners Member
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    Re: 1 7/8th vs 1 3/4" headers

    I am sure this question has been asked 1000000000000000 times, but which header system do you guys prefer? I found Kooks, B&B, not sure if American Racing makes a header. I'd be interested in a 1 3/4" catted header and a resonator pipe, doesn't have to be 3" since I intend to keep the stock catback, but I'd like it to be able to mate with the stock cat back.

  3. #18
    CTSV_510's Avatar
    CTSV_510 is offline Cadillac Owners Master
    Automobile(s): '06 Z06, '05 CTS-V 453rwhp/434rwtq (sold)
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    Re: 1 7/8th vs 1 3/4" headers

    Kooks & B&B seem to be the most popular.

    American Racing manufactures CTS-V headers now, but they are sold as TPIS brand.

    Katech used to make off-road only headers but I don't know if they have any left laying around.

    Headers will turn your car into a whole new beast.

  4. #19
    lubelizard is offline Cadillac Owners Member
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    Re: 1 7/8th vs 1 3/4" headers

    Ah, that's right, I saw TPIS headers on ebay for 1225, the header and metal substrate cat. How are they compared to the other 2 as far as price, performance, quality? Are there discount vendors on this site?

    Sorry for the highjack.

  5. #20
    CTS-Voodoo's Avatar
    CTS-Voodoo is offline Cadillac Owners Enthusiast
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    Re: 1 7/8th vs 1 3/4" headers

    Quote Originally Posted by lubelizard View Post
    I am sure this question has been asked 1000000000000000 times, but which header system do you guys prefer? I found Kooks, B&B, not sure if American Racing makes a header. I'd be interested in a 1 3/4" catted header and a resonator pipe, doesn't have to be 3" since I intend to keep the stock catback, but I'd like it to be able to mate with the stock cat back.
    This is like asking which color of V is the fastest. Every member here will tell you why black is faster than red yada yada yada... The pipe diameter and collector size are what matter the most - and of course, theyre all the exact same in that respect. Almost all have offerings in 1 3/4 and 1 7/8ths primaries with a 3 inch collector. American racing and Kooks I believe have Venturi collectors, though I have not seen a noticeable power difference despite the logical smoothing of the exhaust flow. Kooks was the CLOSEST to being tuned length, but still fell off hitting that mark. TPIS are steel ceramic coated in and out. I believe they have switched to american racings since. Stainless works, BB, American Racing, Kooks are all stainless steel, I don't know how long they last in real wet weather conditions.

    As for power output, theyre all about the same, size of the primaries matters the most, 1 3/4 will get the most midrange power with the least loss of comparble torque on a stock engine compared to the 1 7/8ths headers which will be more top end on a stock motor or for those with a whole lot of mods. As a general rule 1 3/4 add about 15/15 before a tune, 1 7/8ths add about 18/12 before a tune. After tuning you can about double those numbers. Figure a stock rear wheel with exhaust at 335rwhp, the headers usually put our cars around 360-370rwhp and they sound amazing. Have fun!

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