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Old 01-07-2009, 02:32 PM   #1
06impreza2.5i
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Default wrx brake

hello .... i got a 06 2.5i ...
and im trying to get whole brake system from 05 wrx ....
does anyone installed on their 2.5i ??
i wanna make sure it fits on 2.5i without any modification ....

thank you
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Old 01-07-2009, 02:52 PM   #2
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The only real benefit I believe is bigger rotors in which case your going to need the WRX brakets that hold the caliper on, everything should bolt up otherwise. Why switch to the 05 and not the 06 they came with the better calipers? The 2.5i brakes aren't as bad as everyone things I would just get some better pads, DOT 4 fuild, and the H6 rear rotor upgrade.
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Old 01-07-2009, 02:59 PM   #3
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i wouldnt even bother with pads for right now. get some SS lines for $100 and that will make a huge improvement
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Old 01-07-2009, 03:22 PM   #4
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^^ SS lines don't actually do anything but improve feel slighty.. 05 wrx brakes are very good and I would save your money for 4 pots subaru or something better if your think you really need it.

Otherwise, spend the money on pads and fuild.. that will set you back a couple of hundred..
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Old 01-07-2009, 05:33 PM   #5
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Stick with stock calipers and go with better pads and fluid, that will make a big difference.
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Old 01-07-2009, 05:51 PM   #6
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go ask in the brake section, they might help you more.
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Old 01-07-2009, 05:59 PM   #7
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This might be better suited for the Brakes, Steering & Suspension forum.

From what I read on this thread.
http://forums.nasioc.com/forums/show....php?t=1265631

The only benefit as far as rotors is a larger diameter front rotor. The rear is the same size. We run the same pads front and rear as 05 WRX's.
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Old 01-07-2009, 06:25 PM   #8
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Quote:
Originally Posted by obs2008 View Post
i wouldnt even bother with pads for right now. get some SS lines for $100 and that will make a huge improvement


pads make the biggest improvement. SS lines do very little.

Yeah, this thread is kind of out of place here and is better suited for the other forum section. The NA powertrain section has been mainly the engine and little else.

The WRX fronts are a step up in rotor size, meaning slightly more torque and slightly better heat dissipation. However, you'll want to upgrade the rear to the Outback rotor and bracket too ("H6 upgrade") to neutral out the brake bias, otherwise, you will create a front tire lock happy setup.

Pad choice will play a big roll in how the brakes function. Choose smartly because the pads will dominate how the brake system feels and operates.
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Old 01-07-2009, 07:36 PM   #9
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oh they do very little???? man, for the average dude, you will get the biggest pedal improvement out of ss lines.
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Old 01-07-2009, 09:41 PM   #10
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thank you for all the reply ....
my front and rear pads are done ... someone was asking 320 for the whole brake kit from 05 wrx with 200 miles on the pads ... so i figured i pay little more for 4 pots ....
i hate the look of stock 2.5i calipers.....

neway what is the differences between 05 and 06 wrx 4 pot ??
should i look for the 06 or just get 05 ??
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Old 01-07-2009, 10:01 PM   #11
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The USDM 05 are NOT 4-pots, they are sliding 2-pots exactly like yours only with a longer bracket to clear the larger rotor. IIRC the 05 WRX rears are EXACTLY the same as yours. They will be of limited benefit, if anything the swap will just increase your front bias UNLESS you also do the larger 'H6' rotor conversion at the rear.

See the Compiled brake information thread and Notes on Brake Interchangeability in the Brake Supersticky.
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Old 01-07-2009, 10:34 PM   #12
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Brake setup I like is the LGT front brakes and H6 rear rotors
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Old 01-07-2009, 10:56 PM   #13
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oh shoot .... i thought all the wrx has 4 pots .....
what about 06 ??

lgt front and H6 rear rotors with same rear brake ??
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Old 01-07-2009, 11:32 PM   #14
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well the 05 LGT (315x30mm rotor) fronts require use the whole front brakes. Caliper, brakets, pads and rotors. Stock line will work. The H6 rear requires only the different caliper braket and rotor as it's just large in Diameter and you will have to remove the dust plate.
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Old 01-07-2009, 11:35 PM   #15
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06/07 WRX are the only ones with 4-pot/2-pot. And the H6 upgrade involves your stock caliper with a different caliper bracket to accomodate the larger rear rotors.
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Old 01-07-2009, 11:35 PM   #16
06impreza2.5i
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what is H6 rear ??
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Old 01-07-2009, 11:38 PM   #17
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better to get 06/07 wrx brake set ??
cause i want something that looks good .... ^^
thank you
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Old 01-07-2009, 11:42 PM   #18
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please... read the threads I posted and then post back if you still have q.s

don't forget wheel clearance
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Old 01-08-2009, 12:03 AM   #19
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Quote:
Originally Posted by obs2008 View Post
oh they do very little???? man, for the average dude, you will get the biggest pedal improvement out of ss lines.

I'm a bit skeptical of the whole stainless lines thing. I've heard everything from "huge difference" to "unnoticable."

I have next to zero experience with them, however there is something which nags me: brakes run at very high pressures. This makes me think that brake lines, from the factory, probably integrate a braid or two somewhere along the line. I've certainly used full plastic hose rated all the way out to 5kpsi, but it's actually a hell of a lot stiffer than any braid-reinforced hose.





Actually, on searching, it seems that most patents describe 5 layers: one tube for contact with the fluid in question, two braids (fiberglass is mentioned several times) and two rubber layers (one outside, one between braids). My guess is that no stainless braid is going to be any better than that.
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Old 01-08-2009, 12:21 AM   #20
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I don't think its so much about a brake lines ability to hold 5,000psi as it is its non-ability to expand under hard braking.

And the 4/2 pot brake setups obviously perform better(and look better) than the 05 wrx brakes. Hence a 6 piston difference. Don't get these just because they "look" better than the stock brakes. Function>Form. All depends how much you're willing to spend brother. Get used stuff on teh cheap.
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Old 01-08-2009, 12:26 AM   #21
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Quote:
Originally Posted by mdungelman View Post
I don't think its so much about a brake lines ability to hold 5,000psi as it is its non-ability to expand under hard braking.

I'd wager that glass is far stiffer than most steel.
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Old 01-08-2009, 01:51 AM   #22
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You also want to remember that you can only stop as fast as your tires will let you. Don't go upgrading to some huge brake kit if you're still on all seasons.
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Old 01-08-2009, 01:53 AM   #23
06impreza2.5i
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this is more complicate than i thought ..... T,T
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Old 01-08-2009, 01:57 AM   #24
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You should read this thread. PLENTY of GREAT info.

http://forums.nasioc.com/forums/show....php?t=1154081
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Old 01-08-2009, 09:17 PM   #25
06impreza2.5i
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thanks for all the info .... im just gonna get pads ...

which company brake pads are good for 2.5i ??
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