Strut tower front brace install WRX/STi:

This strut tower brace guide should work on both 04 and 05’s just fine (mine is an 05). I’m not sure about the 06s’ since they relocated the AC line and it looks like Whiteline makes the only strut bar that will work on an 06. A little bit of modification with the 06+ model cars might be necessary. These are also specific to the JDM Spec-C Titanium Strut Bar but should work as a general guide for any strut bar on an STi.

1.) Remove alarm horn bar from passenger strut tower bolts which are 12mm. Disconnect the horn and put it aside for now. We’ll screw the horn into the side of the strut tower once we’ve installed the strut bar.

2.)Lower the AC line bracket down a screw. This is the AC Bracket you need to unscrew (use a philips head screw driver or 10mm ratchet). You’ll need to remove the bolt that connects the AC line to the bracket and also the bracket where it connects to the firewall. Remount the bracket down a screw by mounting the upper hole where the bottom screw hole on the firewall is. The bracket is the copper colored metal piece.

3.) Install Strut Bar.

First remove the bolts holding the struts to the strut walls. Bolts are 12mm. They should come off pretty easily since they are only torqued down to 14.5ft-lbs.

I found it was easiest to unscrew the strut bar into 3 pieces, the 2 parts that connect to the strut tower and then the actual bar itself (bolts/screws are 12mm). I put the round strut tower parts on first and loosely bolted them down. Then I placed the strut bar on top and loosely screwed down the strut bar to the strut tower connection pieces.