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  1. #1
    VXR enough
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    Default double de-cat question

    I spent a good while using the search button last night but could not get an exact answer to this , im think of going double decat , yes I know its loud on cold start up but can I weld in a sport cat and still get the same loud as the u-tube vids ive been watching ?? I was thinking of sticking one in where the 2nd cat was , so no main cat nr the tubby just this one further down

  2. #2
    VXRed blooded
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    if you remove the main cat you need to relocate the 2nd O2 sensor or you will have Engine light on dashboard.

    But basically yes you can use decat Downpipe and a secondary sport cat, that's even the best option performance wise, not the cheapest one, but the better power output.

  3. #3
    VXR enough
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    ok great , so put an O2 after where ever I place the sport cat ? I defo want that extra noise the main decat provides pal , its awesome ! on the sport cat front is a 100 or 200 cell best ? I presume the 200 will be slightly more restrictive ?

  4. #4
    VXRacing ahead
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    20th June 2010
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    when ui did mine .i changed the front pipe to the courtney one , then added the scorpion pipe to replace the 2nd cat , and took out the middle box . so have just the rear boxes still . nice when on cold start , ( its loud to warm up the cats ) then a nice burple when normal driving , but will pop when given it the beans .

  5. #5
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    Cool , did you do the O2 mod ?

  6. #6
    VXRed blooded foxumall's Avatar
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    1st September 2009
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    I was just about to ask the same ?
    I've just got a scorpion de-cat for mine the main cat replacement already done the pre-cat
    Also will I have to get it re-maped for fueling reasons as well ? I've already had it mapped with the pre-cat delete fitted
    Last edited by foxumall; 3rd December 2018 at 03:25 PM.

  7. #7
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    I think your map will need a tweak to take into account the removal of the other cat pal

  8. #8
    VXRed blooded foxumall's Avatar
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    Cheers mate I thought it might

  9. #9
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    no probs , back when I had my first siggy , I was running an EDS map which was spec'd for air filter and full decat , it was epic even though I was still running the main cat in my set up , replacement main cat pipes were in development stages back then I think

  10. #10
    VXRacing ahead
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    Quote Originally Posted by bembo449 View Post
    Cool , did you do the O2 mod ?
    whats that ??

    i did these then had it mapped so i would have thought the mapping would have taken that into account ??

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