downpipe install
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This is a discussion on downpipe install within the Engine Performance forums, part of the Tutorials & DIY category; I waiting on my bosal downpipe to show up. Does the stock downpipe have an O2 sensor? I know theres ...

  1. #1
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    Question downpipe install

    I waiting on my bosal downpipe to show up. Does the stock downpipe have an O2 sensor? I know theres one in the 3 cat. I have purchased the bosal for that reason. I am hopeing i won't need the cel fix with the bosal downpipe. Has anyone ran into a problem with the bosal throwing codes? Im also installing a helix uppipe at the same time. Please let me know.

    Thanks
    Brian
    Rev'n Seven Motorsports And Quad City Boxer Four
    02 WRX Wagon 13.6@99mph 1.90 60 foot

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  3. #2
    Registered User TheBoostCreep's Avatar
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    I think as long as you're keeping the mid-pipe/3rd cat and using the o2 sensor in it, you'll be fine. No CEL.
    I'm TheBoostCreep, and I approved this message.

  4. #3
    Registered User Redline927's Avatar
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    i hope thats the case, i will be gettin a Bosal DP soon as well , but will probably get an AP a the same time though anyways

  5. #4
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    I only had one bolt break on me. It was pretty easy to install. The up pipe is the pain and mine came out throw the top not the bottom. There is a noticable difference in power and driveabilty. It took me about 7 hours to install by myself. Just take your time and spray everything down with pentrating oil.

    Good Luck
    Brian
    Rev'n Seven Motorsports And Quad City Boxer Four
    02 WRX Wagon 13.6@99mph 1.90 60 foot

  6. #5
    Registered User fatgroundhog's Avatar
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    I think as a rule, you will throw a CEL when you change your downpipe (maybe not the case if you get a catted DP). It may take some time, even a considerable amount of time, but most end up having CELs. Maybe there are a few who haven't....

  7. #6
    Registered User tubbytreats's Avatar
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    I encourage you to look through our "Tutorials" section for the nice set of "Uppipe, Downpipe, and Muffler Install Guide" instructions before you attempt to tackle this project. They will be instrumental in helping you do things correctly, and knowing what tools you will need to complete the project.

    >>Uppipe, Downpipe, Muffler Install Guide<<

    2002 WRX Mods:
    AP Stage2/93, ScoobySport Up, Dp, & Muffler, SS AutoChrome TMIC, Hawker PC680T Battery, Injen CAI, ACT Stage2 Clutch, Gruppe-S 13.8lb Flywheel, Mobil1 and Redline oil, NGK BKR7EIX plugs, Goodridge SS Lines, Motul RBF600, Hawk HPS pads, 35% 3M tint, Koji Headlight Mod, SilverStar Bulbs, Blaupunkt MP3000 headunit, Infinity BassLink Sub, Kenwood KFC-1689ie speakers (6.5"F / 5.25"R), Rota Downshift (Black), Yokohama AVS ES100 (225/45/17)

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