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Discussion Starter · #1 · (Edited)
Spent an hour installing STI TMIC on WRX today. I will post a picture tomorrow.

If you want to install STI TMIC with missing y-pipe (and use your WRX Samco hose), you will encounter two problems.

1. Brackets will not align (on driver's side)
2. Samco IC hose is about 1" short.
 

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Discussion Starter · #2 · (Edited)
Solutions:

1. You will have to cut the Samco IC hose to extend the Samco IC hose. Use 1 7/8" OD coupler from Advance auto part to extend the length. I P&P'd the pipe to smooth out the edges.



2. Longer Throttle body hose
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



ps: picture shown above has color matching turbo to IC hose. I bought it for $38 shipped from sylinmotors.com
 

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Discussion Starter · #4 ·
Update: USDM STi air splitter and shroud kit WILL NOT WORK on 02-03 WRX with STi hood scoop. You must get a JDM V7 air splitter kit.
 

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How did you get the driver side bolt to line up with the bracket?
I had to bend the pass side bracket to line up with the IC but the driver side looks like it has to be shortened in order to line up.
 

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FYI -

passanger's side bracket mod:

this is for a different intercooler, but same idea...



...and you can buy STi cast aluminum inlets with silicone hose for about $70 on ebay...just be careful when you cut the hose is VERY VERY easy to end up cutting off too much...I ruined 4 before I got it right.
 

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I'm not sure there would be a noticable difference. They're both way better than stock. I have the metal Y myself.
 

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Discussion Starter · #12 ·
If you are looking into replacing your OEM TMIC with USDM STi TMIC, make sure to replace air splitter kit with JDM one from rallispec ($84).

I've been driving my car with regular WRX splitter for several months now and noticed TMIC was getting noticeably hot... I placed an order for a correct air splitter kit from rallispec yesterday finally. :)
 

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Discussion Starter · #13 · (Edited)
Finally had a chance to install JDM STi air splitter today.

WRX splitter:


Side by side comparison:


Splitter comparison:


Installed:




Directs air through two channels (much more effective in cooling lower section of TMIC).
 

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Discussion Starter · #20 ·
You actually noticed the big difference? I know that STi TMIC with WRX splitter wasn't effective in cooling STi TMIC. It had gotten too hot to touch after one hour of driving on highway...
 
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