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Old 08-16-2021, 11:13 PM   #1
gtasti
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Member#: 152036
Join Date: Jun 2007
Chapter/Region: E. Canada
Location: Ontario
Vehicle:
2005 Sti
Wrb rhd

Default 18+ brakes on 05to07 gdb ?

So Iím wondering if the 18+ Sti brakes fit the gd Sti

Iíve heard fronts bolt right in but not the rears

Any specific reason why ?

Any insight would be great thanks
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Old 08-17-2021, 06:29 AM   #2
snow_bound26
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Beige

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Rear uses a completely different hub/suspension design and has a different offset than the GD. The 18+ 6pots are nice but for that much money I'd go with AP Racing. If this is a daily driven car then GD/GR Brembo front with FHI 2pot rear is a great combo. The FHI 2pots use a 38mm piston compared to the 36mm GD Brembo rear piston.
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Old 08-17-2021, 06:49 AM   #3
gtasti
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So rears aren't possible at all then

Thanks
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Old 08-17-2021, 07:44 AM   #4
snow_bound26
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No.....
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Old 08-23-2021, 01:31 AM   #5
rockthebox50
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SWP & Aspen White

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That sucks I thought I've seen the rears done but it probably was paint matched. You can go all out and source RA-R brakes if available.
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Old 08-23-2021, 08:45 PM   #6
gtasti
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Wrb rhd

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Quote:
Originally Posted by rockthebox50 View Post
That sucks I thought I've seen the rears done but it probably was paint matched. You can go all out and source RA-R brakes if available.
Yeah 7000cdn the 18+ a set just came up local 3k
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Old 08-23-2021, 10:18 PM   #7
snow_bound26
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2005 92x Aero
Beige

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For 3k you can get Stoptech BBK and it will put perform the OEM STi 6pot calipers. But in reality if you're not tracking the car then it's a waste of money either way and will only be for the bling factor
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Old 08-25-2021, 04:24 PM   #8
gtasti
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Probably right lol
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Old 08-25-2021, 05:53 PM   #9
SwollRX
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Quote:
Originally Posted by snow_bound26 View Post
If this is a daily driven car then GD/GR Brembo front with FHI 2pot rear is a great combo. The FHI 2pots use a 38mm piston compared to the 36mm GD Brembo rear piston.
Im eventually swapping over to Brembos or BBK myself. I do track, and the FHI 4/2 pots are adequate, but I go through race pads and rotor blanks very quickly, along with some good chunk of fade (and would like to help manage the heat better). So I too have been on the prowl for information.

Pertaining to the rears, I think OP has an 05 STi listed as their car. I Don't think it it would be an upgrade to switch to the rear FHI 2-pot, even with bigger 38.1mm (according to my 06 service manual) vs Brembo 36mm pistons.

Please correct me if I'm wrong, but are the Brembo Rears (calipers) physically larger then the FHI 2-pot?

Referencing my manual (units in mm): We know the Brembo rear rotors are bigger in both thickness and diameter (FHI: 18 t x 290 OD, Brembo: 20 t x 316 OD). Pad Dimensions are also larger for the Brembos (FHI: 71.8 L x, 35.0 W, Brembo: 74.8 L x 45.0 W).

With this in mind, the Brembos have larger pad and rotor dimensions; would that be an improvement/ better, despite smaller piston diameter?

I am honestly curious about this as well. And would like to learn more.
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