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Old 05-19-2010, 11:25 AM   #1
honda killer
Scooby Specialist
Member#: 239621
Join Date: Feb 2010
Chapter/Region: TXIC
Location: San Antonio, TX
2005 Baja Turbo
Silver/Gun Metal

Exclamation Baja Turbos: What works with What? STICKY THIS!

Upgrading Bajas are a little frustrating, as we all know, because websites/manufactures are not clearly labeling their product as "Baja Compatible". We're forced to do more homework than other, and bounce ideas off others. While that seems fun for other, I find it slows down my work.

I'll start the list, and you reply with updates; then I'll update my main post for quick reference.
Here are some things to get started on:

*******************************Keep in mind the following******************************
If parts are coming off of other Subarus, make sure to list the year and series of vehicle. Also if a part has to be altered to fit, IE trimming; rewiring; welding; or cutting; NOTE IT with a DIY scale of 1-10. Picture are welcome too.
************************************************** *************************************

Top Mount Intercooler (TMIC)
1. USDM STi intercooler (2004-??) Fits a stock Baja turbo with modification to the 90" elbow between the turbo and Y-pipe. The length needs to be changed slightly. Also it requires the Sti or 2.0l wrx bypass valve, Y-pipe, bypass valve vac. line. The bypass valve hose that goes to the intake needs to come from an STI to clear the electronic throttle body. the hoodscoop shroud will no longer fit properly with any larger TMIC.
NOTE: sometimes while in reverse engine rock causes the intercooler to impact the clutch reservoir cap (5MT) a few shims under the mounting tabs where it bolts down will angle the rear up the intercooler up and solve this.

Tumble Generator Valve (TGV)
TGV Deletes
Fuel Injector
Throttle Body
Intake Manifold
Up Pipe
1. 02-07 WRX & STi are compatible, make sure to reinstall the EGT sensor
2. Bosal catless up pipe is a direct bolt on- It is essentially the same as the STI although it may have thicker flanges. Does not have EGT bung so the CEL will have to be turned off at the ECU or the resistor mod. It accepts OEM heat shielding.
Down Pipe
1. Random Technology makes one that is a perfect fit, NO modding (DIY Rating 2)
2. Helix Catless DP requires some cutting to fit (DIY Rating 3)
3. OAKOS Automotive downpipe fits the 5MT Baja turbo with no modification. It clears the brace on the firewall and everything. It is catless and 2.5" diameter.
1. Front Brakes: The Baja shares the front brakes with the 2003-2005 WRX. Rotors and brake pads are directly interchangeable.
2006-2007 WRX 4 pots (red) and the older JDM 4 pots (gray) will bolt up (uses existing rotor) but will not clear the OEM wheel choices. Will need different wheels or wheel spacers.
2004 STI Brembo- direct bolt on, needs larger wheels for clearance. (Must be 2004 STi rotors as anything after that will have a different bolt pattern). May need to dust shields behind the rotors.

Rear Brakes- Baja has same rears as the outback H6. So anything pad or rotor listed for the "H6 rear" will bolt right up. There are some decent choices as this is used to be a pipular upgrade for 2.0 WRX guys back in the day.

Fuel Pump
OEM Radio Deck
Driver/Passenger Seat
Steering Wheel
Air Bags
Center Gauge Cluster (RPM, MPH, Temp)
Exhaust Manifold/ Equal or on Equal
Turbo Charger
1. STI turbocharger is a direct bolt on. It will fit the stock intercooler with some creative stretching and wiggling. But swapping in a proper length Y-pipe is best. Of course with the USDM STi intercooler and Y-pipe it is a perfect fit.
Radio Deck
1. Radio Deck- Basically anything Subaru the same year or older will fit the baja. I replaced the OEM 6 disc with a 2004 WRX head unit to add a tape deck. I also think the illumination matches a bit better.
Short Throw Shifter
1. Short throw shifters- anything for a Subaru 5MT (WRX, FXT, LGT) of the same model years will fit the Baja 5MT turbo or non-turbo. Anything from the SPT assembly to Kartboy lever or bushings.
1. Clutches- 2004-2005 Baja turbo can use anything intended for a 2002-2005 WRX "pull style" clutch. 2006 Baja T is a "push style" and is compatible with 2006-2007 WRX (I do not know about later models)

Baja friendly websites:

Last edited by honda killer; 10-27-2010 at 10:32 AM.
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