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Old 09-11-2004, 08:02 PM   #1
stil2stock
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Default STI to WRX brake swap

Maybe a dumb question, but... is it possible to swap the STi brakes onto my 02 WRX, if, say, i found a wrecked STi in a junk yard? How involved would that be?
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Old 09-11-2004, 10:21 PM   #2
Phil Jr.
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I am pretty sure the front is bolt on to the WRX as long as the rotors are from a 2004 STi. Also you will need proper 17" wheels to fit the larger brembo caliper. As for the rears there are some issues with the parking brake I believe. That being said I would'nt go ahead and just slap on STi braking gear up front an leave your rear stock. That will REALLY mess up the braking bias of the car and most likely lower your performance over stock.

Maybe someone could comment on what must be done to make the rear STi brakes fit a WRX properly. IIRC someone was making a kit so it would be possible with no fabrication on your part.

Hope that helped!
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Old 09-11-2004, 10:24 PM   #3
stil2stock
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Looks like i've got a bit of research to do before i attempt that ish.
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Old 09-11-2004, 10:59 PM   #4
Phil Jr.
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You sure do.

Keep in mind that pretty much any regular 1pot caliper can lock up a rotor....the reason people get BBKs are:

1) looks
2) endurance for fade-free performance at the track
3) better feel

BUT, if you can find a set of front/rear STI brembo/rotors for little or no $$$ then it is an awsome upgrade. Spending $1500-$2000 on the other hand for a brand new BBK seems a little silly to me.
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Old 09-11-2004, 11:06 PM   #5
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You can do the front Brembos and match'em with a H6 rear setup to regain your brake balance. Or you can get fancy and use the rear Brembo's. spiralsmurf, though he's a lil behind, should be finishing up a kit for the rear brembos to r160 hubs soon.

Quote:
Originally Posted by Phil Jr.
BUT, if you can find a set of front/rear STI brembo/rotors for little or no $$$ then it is an awsome upgrade. Spending $1500-$2000 on the other hand for a brand new BBK seems a little silly to me.
Finding Brembos "for little or no $$$" is like a treasure hunt. $2000 is nothing for a good BBK. I wouldn't leave home without a good set of brakes.
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Old 09-11-2004, 11:12 PM   #6
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You're gonna spend some $ to get this done. Considering the amount of braking actually done up rear it's not worth doing the brembo rear conversion in my opinion.

The setup should look mighty nice up front with some 17' STI rims
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Old 09-11-2004, 11:19 PM   #7
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Quote:
Originally Posted by StevieD
You're gonna spend some $ to get this done. Considering the amount of braking actually done up rear it's not worth doing the brembo rear conversion in my opinion.

The setup should look mighty nice up front with some 17' STI rims
I've got a set with your name on 'em...

Hey Stevie, how's it man? It's been a longtime. Oh, btw I sourced a JDM Hid harness from Tokyo Subaru for 15 bucks! Turns out I have a sister-in-law out there.
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Old 05-29-2005, 03:12 PM   #8
remingtonlw
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Default This seems too simple but...

I am a little new to the import world, but very a seasoned street-rod guy. When i have done drum to disk conversions in the past i always (mostly) used an adjustable proportioning valve. Why wont that work for the sti conversion?

LR
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Old 05-29-2005, 07:03 PM   #9
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you can't go wrong with taking the STi 4-pot fronts and putting them on the WRX. unless they're Brembos, i heard with Brembos you have to replace a LOT of parts in order to get them to work...

STi 4-pot in front. H-6 Legacy/Outback in the rears.
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Old 05-29-2005, 07:39 PM   #10
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Quote:
Originally Posted by remingtonlw
I am a little new to the import world, but very a seasoned street-rod guy. When i have done drum to disk conversions in the past i always (mostly) used an adjustable proportioning valve. Why wont that work for the sti conversion?

LR
Modern ABS systems prevent simple installations of brake bias valves, especially considering these systems already have a valve in there. And since the ABS system controls the portportion of brake torque per its sensors and computer, that includes side-to-side and front-to-rear...

There's also quite a few threads. You should do a search.

Quote:
Originally Posted by eltrouble
you can't go wrong with taking the STi 4-pot fronts and putting them on the WRX. unless they're Brembos, i heard with Brembos you have to replace a LOT of parts in order to get them to work...

STi 4-pot in front. H-6 Legacy/Outback in the rears.
Dude, you need to stop guesstimating. Brembo's are straight bolt-on for the front applications. The rears are a different thing altogether.
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Old 05-29-2005, 07:44 PM   #11
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Quote:
Dude, you need to stop guesstimating. Brembo's are straight bolt-on for the front applications. The rears are a different thing altogether.
i just heard that the Brembos require you to get a new hub, new axle, all that stuff. I'm not saying it's absolute truth, just what i heard.

or is this only true for the rears or something?
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Old 05-29-2005, 08:23 PM   #12
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Quote:
Originally Posted by stil2stock
Looks like i've got a bit of research to do before i attempt that ish.


.....now THIS is a great idea
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Old 05-29-2005, 09:51 PM   #13
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Anyone doing a front sti brembo swap on a wrx needs to know that the wrx bracket bolts do NOT thread into the brembo calipers (their bracket is integrated into the caliper). I had to put my wrx rotor and caliper back on until I can obtain some brembo bolts. In my research I didn't come across the fact that the brembos use different bolts, and I did read the '04 sti manual and a bunch of threads here on nabisco before starting this project. Annoying...
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Old 07-18-2005, 11:20 PM   #14
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Chigliakus...

Could you explain more in detail or post some pics? That would be great!

Thx.
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Old 09-29-2005, 01:15 AM   #15
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Quote:
Originally Posted by Chigliakus
Anyone doing a front sti brembo swap on a wrx needs to know that the wrx bracket bolts do NOT thread into the brembo calipers (their bracket is integrated into the caliper). I had to put my wrx rotor and caliper back on until I can obtain some brembo bolts. In my research I didn't come across the fact that the brembos use different bolts, and I did read the '04 sti manual and a bunch of threads here on nabisco before starting this project. Annoying...
Where to get these bolts ?
Do you need to get sti mounting brackets also ?
Planed to swap my front with Sti Brembo, but some private sellers sell only calipers and rotors only. what else are needed for swap ? Thanx
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Old 09-29-2005, 12:41 PM   #16
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Quote:
Originally Posted by ronf
Where to get these bolts ?
Do you need to get sti mounting brackets also ?
Planed to swap my front with Sti Brembo, but some private sellers sell only calipers and rotors only. what else are needed for swap ? Thanx
Just order them at the dealer. They are about 2.25-3.25 ea, and you need 4. No brackets, calipers have the ears cast in. You might want to use the larger STI dustshield, it also has better airflow.
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Old 10-05-2005, 12:30 PM   #17
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I just ditched the dustshields alltogether, both front and rear. I never go off-road and I suspect I get better cooling as well. No problems with brake fade on the road course at least. YMMV
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Old 10-05-2005, 06:41 PM   #18
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FYI: Only get the caliper bolts from the dealer cuz the bembo torque for the STi is 100-120 lb if I remember right.
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Old 10-05-2005, 06:51 PM   #19
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Or just buy the Brembo kit complete - $1200 for new everything pads/slotted rotors/calipers/SS lines doesn't sounf too bad compared to takeoffs of questionable condition. There's a thread in the vendor section
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Old 10-05-2005, 07:16 PM   #20
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Quote:
Originally Posted by StevieD
The setup should look mighty nice up front with some 17' STI rims
17' would make the Brembos look tiny
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Old 04-06-2006, 01:31 PM   #21
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Quote:
Originally Posted by Chigliakus
Anyone doing a front sti brembo swap on a wrx needs to know that the wrx bracket bolts do NOT thread into the brembo calipers (their bracket is integrated into the caliper). I had to put my wrx rotor and caliper back on until I can obtain some brembo bolts. In my research I didn't come across the fact that the brembos use different bolts, and I did read the '04 sti manual and a bunch of threads here on nabisco before starting this project. Annoying...

can anyone confirm this? in all my research, i havent heard this mentioned before. I have 04 sti calipers going on 03 wrx..didnt come with bracket bolts
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Old 04-07-2006, 05:16 AM   #22
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FWIW, and at the risk of being flamed (again) I changed out my stock 4 spotters on the front of my Aussie 02 WRX for Brembos and I did have to use the bolts that came with the Brembos. Bolt head size is larger also.

I left the rears stock and I really don't know what all the fuss is about leaving them stock. Geez, it's not like we're doing F1 or WRC you know I get no fade on the track anymore and the rear under heavy braking is so light anyway that an upgrade is not necessary IMO.
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Old 04-07-2006, 11:37 AM   #23
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I've thought about the front brembo conversion for my wrx and i've come up with 3 choices for the rear: H6 upgrade, LGT vented rear upgrade, or the rear 2-pot conversion. Oh ya, and there is a vendor on the boards selling a whole front brake setup (calipers, rotors, lines) for fairly cheap for what it is.
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