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Old 05-03-2006, 02:15 PM   #1
SpeedElement
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Join Date: May 2002
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2004 WRX/STI
Aspen White

Default Cusco Rear Subframe Brace w/ STi Rear Diffuser

Here are some pix of Cusco Subframe Brace w/ STi Rear Diffuser Installed on one of our customer's car.
Cusco Subframe Brace CUS-673-487A, Cusco Subframe Brackets CUS-672-487S, and STi Rear Diffuser


Cusco Subframe Brace Installed (Under Car View)

STi Rear Diffuser Bracket #1 (comes w/ 2 brackets)

Cusco Subframe Brace Installed on the Right side of chassis

Cusco Subframe Brace Installed on Left side of chassis
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Old 05-03-2006, 02:19 PM   #2
SpeedElement
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Subframe Brace installed along w/ STi Diffuser Bracket installed.

STi Mounting Bracket installed (black piece)

STi Mounting Bracket #2 (near the License plate frame)

STi Rear Diffuser Installed

The Exhaust is Apex'i WS Exhaust. The muffler is quite big compare to other types of exhaust systems. However it clears just fine with the diffuser.

Overall impression: The install took about 1 hour. As you can see, the car still on stock rear swaybar, but the rear feels much stiffer with this subframe brace installed after we took for a spin. The installation of the STi rear diffuser was a breeze with these Cusco pieces in place. We think the diffuser will work pretty good if we go over 100+mph.. But it looks good nontheless.
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Old 05-03-2006, 02:29 PM   #3
Vampyr
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Great pics!!!!

thanks for the info!
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Old 05-03-2006, 02:32 PM   #4
SpeedElement
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no problem. These subframe brace will also fit GC/GF chassis Imprezas, GD/GG Sedan/Wagon and of course 04-05 STi

Thanks

MPJ
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Old 05-03-2006, 03:29 PM   #5
sjs0433
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any pics from farther behind the car....i'm actually more curious to know how the apexi exhaust looks on the car
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Old 05-03-2006, 04:30 PM   #6
slowscooby
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Cool write up. Always wondered if that brace did anything except give you a mounting support. They charge enough for the damn thing.
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Old 05-03-2006, 04:54 PM   #7
SpeedElement
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This Apex'i WS exhaust actually looks quite stock from behind. I will post some more pictures when my friend comes back to the shop.

As for the price, the STi Diffuser is actually about $79 free shipping.

The Cusco Subframe Brace and Subframe brackets cost about $165 free shipping.

The subframe brackets are not needed if you don't plan on using the rear diffuser.

Thanks

Calvin
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Old 05-04-2006, 04:48 PM   #8
SpeedElement
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still have some left! plz give us a call if you have install questions
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Old 05-04-2006, 07:40 PM   #9
calmnothing
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Does the brace provide any noticable stiffening?
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Old 05-04-2006, 08:40 PM   #10
SpeedElement
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yes it does. The car in the pictures above did not have any rear swaybar, we noticed the rear had stiffened up a bit after the subframe brace/diffuser install.
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Old 06-24-2006, 11:32 PM   #11
jwtarbaj
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Any idea what level of modifcation is required for WRX owners with afermarket RSB mounts? I have seen that there is a fitment issue with aftermarket mounts. That's a problem for us 02-03 owners especially since we had crappy stock mounts.
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Old 06-25-2006, 09:33 PM   #12
perfusionista
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Quote:
Originally Posted by MPJ Performance
yes it does. The car in the pictures above did not have any rear swaybar, we noticed the rear had stiffened up a bit after the subframe brace/diffuser install.
Sorry, but I'm going to call "placebo effect": you knew that something had been done to the car, so you felt that the performance had changed appropriately. I'm not convinced that placing a bar between the sway bar mounts can produce a palpable change in the rear suspension (maybe if we had F1 standard telemetry! )

Go drive around the same test course, with the mechanics changing the set-up between runs but not telling you what they're doing, then you can find out what really changes the performance (BTW they must include no-change in their mods, that's usually the most revealing!)

EDIT: I'm actually planning on adding this bar and the diffuser, because I think it places the diffuser in a better position (vs bolting it right up to the bottom of bodywork) but I'm not convinced the bar itself is any improvement.

Last edited by perfusionista; 06-25-2006 at 09:52 PM.
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Old 06-25-2006, 10:13 PM   #13
BIGSKYWRX
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^ I'd have to agree, but it did line up the diffuser nicely . You can read my impressions on the rear diffusor w/ the under side aero bits in exterior.

If you have a 02/03- upgrade to the 04+ rear mounts- it's a good upgrade even if you don't do the cusco/diffuser- and it's pretty cheap too.
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Old 06-25-2006, 10:31 PM   #14
desertaero
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does it require any drilling for the rear two bracket bolts?
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Old 06-26-2006, 01:58 AM   #15
ralliharri
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No drilling required, only 2 M6 bolts and nuts is needed in addition to the kit, real easy to install.
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Old 06-26-2006, 02:38 AM   #16
IIdiceII
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sorry to be a tiny bit off topic

any pics of the exhaust from further away?
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