DIY: STi TMIC with Y-pipe on WRX
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This is a discussion on DIY: STi TMIC with Y-pipe on WRX within the Engine Performance forums, part of the Tutorials & DIY category; Follow this instruction if your USDM STI TMIC came with a y-pipe. Problem: You will notice that Y-pipe to turbo ...

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    Registered User WRXreX's Avatar
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    DIY: STi TMIC with Y-pipe on WRX

    Follow this instruction if your USDM STI TMIC came with a y-pipe.

    Problem:
    You will notice that Y-pipe to turbo hose is about 1" short!

    Solution:
    Order 2" 90 degrees ID hose here for $38 shipped. You will have to cut about 1 cm to create a perfect fit.
    http://www.stylinmotors.com/90Elbow.html

    Problem:
    Brackets will not align with the intercooler on passenger's side. It is perfectly normal for USDM TMIC to not correctly align with brackets. Why? because throttle body hose is about 0.5inch short.

    Solution:
    Intercooler to TB hose is about 67mm ID (too short @ 2" in length). You can order a 2.75" ID turbo hose (3" in length) from here if you decide to correctly mount both brackets. http://www.stylinmotors.com/turbohose.html

    Problem:
    WRX splitter and seal won't align correctly!

    Solution:
    order air splitter and seal kit from rally spec
    RST-9085kit Air Splitter & Seal Kit MY02-03 $84
    http://www.rallispec.com/

    Installed pictures:


    Last edited by WRXreX; 04-05-2006 at 08:00 PM.

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  3. #2
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    Thanks!

    Followed your instructions and they worked flawlessly.

    Stuff from StylinMotors was excellent too.

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    what modification would be needed to install on a 04-05 for the splitter and seal?

    I am guessing just a 04-05 sti seal and splitter?

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    Registered User WRXreX's Avatar
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    Quote Originally Posted by nvsn8
    what modification would be needed to install on a 04-05 for the splitter and seal?

    I am guessing just a 04-05 sti seal and splitter?
    I believe so. On my 02 WRX, I had to use JDM splitter and shroud.

  6. #5
    Registered User 06WhiteWRX's Avatar
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    i have an 06 wrx and i got an sti top mount sitting in my garage. which one should i get so that it will reach the hose to the turbo.like u said.. its 1inch short.
    but theres alot off diff sizes to chose from. any specific one i should get?
    thanx
    mods
    Hawk-Eye alliance #111

  7. #6
    Registered User carnitas's Avatar
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    i also have an 06, do you think its necessary to buy a new splitter?

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    Quote Originally Posted by LarsBars View Post
    Thanks!

    Followed your instructions and they worked flawlessly.

    Stuff from StylinMotors was excellent too.

    Wanted to pass on this info, this thread helped me so figured I would submit something of merit.

    sylinmotors added a subie page. They now have inlet hose and a hose kit. I am going to order the inlet hose. let you know how it works.

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    Resident meany-rator 06wrx4me's Avatar
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    With 06+ you need only the elbow. The throttle body is 1/2" longer due to throttle by wire instead of throttle cable. It has the same TB as the STI now.
    2014 Ford Fiesta ST

    06 WRX, HAWKEYE # 001 <T-boned and sold>

    COILOVER TABLE
    TURBO TABLE

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    Registered User StarScream's Avatar
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    just to be sure....The elbow = 2" 90 degrees ID hose ? ?

    Oops....nevermind. The answer to my own question is YES.
    Last edited by 06wrx4me; 02-19-2008 at 06:07 PM.

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    Quote Originally Posted by StarScream View Post
    Oops....nevermind. The answer to my own question is YES.
    U are correct.

    Sylin' even took the guessing out of the equation. They have a kit for this too now. USDM STI conversion kit

  12. #11
    Resident meany-rator 06wrx4me's Avatar
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    Quote Originally Posted by LarsBars View Post
    U are correct.

    Sylin' even took the guessing out of the equation. They have a kit for this too now. USDM STI conversion kit
    Yeah but with an 06+ you don't need the 2.75 coupler.
    2014 Ford Fiesta ST

    06 WRX, HAWKEYE # 001 <T-boned and sold>

    COILOVER TABLE
    TURBO TABLE

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    Quote Originally Posted by 06wrx4me View Post
    Yeah but with an 06+ you don't need the 2.75 coupler.
    Isn't that what the kit they have comes with? I thought it was.

  14. #13
    Resident meany-rator 06wrx4me's Avatar
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    Quote Originally Posted by LarsBars View Post
    Isn't that what the kit they have comes with? I thought it was.
    The kit comes with 1-2" 90 degelbow and 1-straight piece and clamps.

    For 06+ WRX you only need the 1-2" 90deg elbow.
    2014 Ford Fiesta ST

    06 WRX, HAWKEYE # 001 <T-boned and sold>

    COILOVER TABLE
    TURBO TABLE

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    Quote Originally Posted by redrexmeister View Post
    You get what you pay for. Found out the hard way. My bulged and popped in less than six months.

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