Subaru WRX Forum banner

DIY: STi TMIC with Y-pipe on WRX

52K views 20 replies 11 participants last post by  beedee 
#1 · (Edited)
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:


 
See less See more
2
#4 ·
nvsn8 said:
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.
 
#17 ·
so I brought this 06 sti tmic and the guy said hes keeping the y pipe and everything for his new iC. So I only get the core. Can I reuse the metal cast iron part from my 06 wrx and just order the silicon y-pipe that join the cast iron part (90 degree albow connected to the intercooler to the y -pipe)? What else do I need? Please advice.

Sam
 
#21 · (Edited)
i got around to doing this and thought i'd post a little write up on the splitter differences.

this first pic shows the STi tmic (duh):


once i removed the wrx hoodscoop splitter/bellow, i placed it on top of the STi tmic so you can see how much smaller it is, and how much of the STi tmic is not being utilized due to the smaller wrx splitter/bellow:


here is the STi hoodscoop splitter/bellow resting on top, as you can see, a perfect seal:


now here are the two splitters side by side; STi on the left, wrx on the right. you notice that the STi one has a piece in the middle to deflect air to the lower part of the tmic:





install was a breeze, simply remove the 7 (seven) 8mm bolts, and the one plastic clip and gently pop the splitter piece off. align your new one to the holes, insert the two little tabs at the bottom and install the bolts, then plastic clip. it took me about 10 minutes. :D
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top