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This is a discussion on Downpipe question within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; Originally Posted by SubiEj255 I know this is old, but no one told me where the 2nd cat was. The ...

  1. #16
    Master Baiter EJ257's Avatar
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    Quote Originally Posted by SubiEj255
    I know this is old, but no one told me where the 2nd cat was.
    The '09+ may only have one cat. I haven't done a downpipe install on one to confirm, but I believe they only have the one now.
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  3. #17
    Registered User Axex's Avatar
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    Quote Originally Posted by SubiEj255 View Post
    I know this is old, but no one told me where the 2nd cat was.
    I'm pretty sure they are both on the downpipe. An aftermarket catted downpipe will replace both with 1 high flow converter.

  4. #18
    Registered User SubiEj255's Avatar
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    There isn't one in the midpipe/test pipe?
    A car is only as good as its driver

  5. #19
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    Quote Originally Posted by SubiEj255 View Post
    There isn't one in the midpipe/test pipe?
    Look under you car.... It takes 25 seconds to look.

    I know for my car (03 WRX) there was a cat in the uppipe, downpipe, and midpipe. That being said, my car now only has one highflow cat in the midpipe.

  6. #20
    Registered User PBallen's Avatar
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    This should help.......


    Click image for larger version. 

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  7. #21
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    Quote Originally Posted by SubiEj255 View Post
    Here in md they don't do the sniffer on newer cars.
    They don't? They did on my last cars that were new.
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  8. #22
    UnBanned Sinister's Avatar
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    They do on mine too... it's a regional thing
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  9. #23
    Subaru Newb MainFrame's Avatar
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    Quote Originally Posted by Sinister View Post
    They do on mine too... it's a regional thing


    Yep.. depends on which county the car in registered in.

  10. #24
    Registered User SubiEj255's Avatar
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    Oh yea that help a crap ton man... Where you find that? I would love to have an engine schematic like that.
    A car is only as good as its driver

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    Subaru Newb MainFrame's Avatar
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    Quote Originally Posted by SubiEj255 View Post
    Oh yea that help a crap ton man... Where you find that? I would love to have an engine schematic like that.

    That exhaust diagram? It's probably been on here for eight or nine years, lol.

  12. #26
    Registered User SubiEj255's Avatar
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    See I didnt kno that LOL. I've been lookin for as many diagrams as possible for these cars. I can't find any.
    A car is only as good as its driver

  13. #27
    Subaru Newb MainFrame's Avatar
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    google is your friend


    (also the forum search function)

  14. #28
    Registered User SubiEj255's Avatar
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    Last question I have is I have a Cobb AP, I seen it said that map is for catted DP. What could happen with running it with a catless?
    A car is only as good as its driver

  15. #29
    He simply abides. SD_GR's Avatar
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    Downpipe question

    Search "boost creep" and follow the link in my signature for other info.
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  16. #30
    Registered User SubiEj255's Avatar
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    So the only disadvantage with a catless DP tuned with an AP is boost creep?
    A car is only as good as its driver

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