Longtube Headers With Catts?

Discussion in '2005 - 2014 S-197 Mustang -General/Talk-' started by MyJayy, Feb 10, 2013.


  1. MyJayy

    MyJayy New Member

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    So I've heard and seen people put Long tube headers on there 05-09 mustang gt with catts!?
    Is that a lot of custom work? Does it knock down the power you get out of the Long tube headers if you add catts? Will it pass smog with legal catts? If so what kind of catts are they?
     
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  2. SpartaPerformance

    SpartaPerformance Site Sponsor

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    No custom work at all, when you buy a premium set of long tubes such as American Racing Headers you get a complete ssystem with headers and mid pipe, It's a straight forward install although time consuming. With a good tune you can pick up 25-30 rwhp across pretty much the entire rpm range on a 3v and 30-40 on a Coyote. That's with cat's
     
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  3. MyJayy

    MyJayy New Member

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    Dam that sounds like some good power gains, American racing headers is really pricey though. Is that what you have ?
     
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  4. earleys94gt

    earleys94gt Active Member

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  5. MyJayy

    MyJayy New Member

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    Thank you earley's !! for the links too. That's what I was trying to look for!!!
     
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  6. earleys94gt

    earleys94gt Active Member

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    No problem
     
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  7. SpartaPerformance

    SpartaPerformance Site Sponsor

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    Yes I have them on my personal car, and yes they are expensive but they are THE best. LT's are something you wan to buy once and install once. I've had mine on for 3 years and still look brand new. They are expensive because they use the best materials, all sourced in the USA and are hand crafted not pumped out by a machine like the cheapo Chinese ones.
     
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  8. retfr8flyr

    retfr8flyr Member

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    The car will not pass emissions with L/T's and catted mid pipe in CA. Everything in CA requires a CARB number and there aren't any L/T headers with a CARB number, that I am aware of.


    Earl
     
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  9. jpplaw

    jpplaw Member

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    Notwithstanding the "California" problem -
    Also be aware that not all hi-flo cats are created equal. If the rear O2's are turned on in your tune, then you may get cat efficiency codes. With these you cannot pass the OBD2 part of inspection. If the rear O2's are off in your tune, you also will not pass OBD2 inspection.
    Some have had luck with rear O2's turned on in the tune and using anti-foulers (single or doubled). This would not work for me - I had to get green cats from Kooks Headers. Worked like a charm.
     
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  10. sea ya

    sea ya Founding Member

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    where are we going,& why am i in this handbask
    I am running jba set up " Cartted " and comp cams ,though my tuner and comp said run cat less,I just got back from a 1100 mile trip in mine and really glad I'm running cats !
     
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  11. Bojingles

    Bojingles Well-Known Member

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    I ran with BBK longtubes and cat'd shorty x-pipe. Had the 02 efficiency problem but only on one side. BBK didn't help me at all saying it's a hit or miss and have a good day. I'll end up replacing the cats eventually but right now I'm ok because I'm in a safety only inspection area.
     
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  12. SpartaPerformance

    SpartaPerformance Site Sponsor

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    Sometimes I have a cat efficiency problem too on driver side. Usually if I let the car get to operating temperature before I drive off it doesn't happen.
     
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