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Suspension | Chassis | Brakes -- Sponsored by 949 Racing Relating to suspension, chassis, and brakes. Sponsored by 949 Racing.


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Old 04-02-2013, 08:32 AM   #1
swift996
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Wilwood BBK for WRX - Fit to BRZ

First off, I can't take credit for the idea because I bought them from Scooby South because he wasn't able to use them in the STX class.

They are only the 4-pot calipers and the rotor diameter is only 12" (compared to the stock 11.5"). They shave 16lbs per corner and are about 1mm thinner. However, since they are designed for a 3300lb WRX, I'm not worried on a BRZ.

There was one exception to this kit, the bolts supplied don't work with the bracket, you'd have to order the 08+ specific bolts. The Part# is 230-10425 (they are 7/16-20 x 1.50 hex bolts - you will need 4) for those interested.

Kit part #140-9193 Subaru WRX 03+


The kit:






Install - I had Brady up at Pure Automotive install them. It was pretty straight forward. The kit comes with everything including stainless lines.

Review - The car has really come to life. The brake feel and bite is much improved. The car is so much faster on back roads now. I'm very happy with the purchase. I had a little bit of clanking noise (perhaps pad knock back) early but that has seemed to go away. It could have just been breaking the pads in. This is my first aftermarket kit. With BMW and Porsche you have a lot of OEM options.

The kit runs about $1K, which puts it at a price point between a stoptech slotted kit and the 6-pot 13" wilwood kit that runs about $1.7K. So this is a viable option for guys on a budget but want some improved performance.



FYI - That strut assembly is not mine




I'm sure from a roll they look real nice, but parked..almost stealth:




Driver's Side:


Passenger's Side:
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Old 04-02-2013, 09:03 AM   #2
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Thats a great looking option for a realistic brake upgrade. Do you run your car in the snow? My only reservation about a wilwood kit is no dust boots.

And WOW is that a lot of weight savings!
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Old 04-02-2013, 10:02 AM   #3
Beyer Subaru
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Looks great. Thanks for sharing.
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Old 04-02-2013, 10:05 AM   #4
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this is really good info thanks!
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Old 04-02-2013, 10:07 AM   #5
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@PRORICAN

more affordable brake option
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Old 04-02-2013, 10:36 AM   #6
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Looks like everything went together great. Do you have any plans on track days or autocross? Would love to get your impressions on how these do with proper track pads and hard use. Dropping 32 pounds of rotating unsprung mass is huge man!
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Old 04-02-2013, 10:42 AM   #7
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I've been waiting to see this - thank you!
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Old 04-02-2013, 10:51 AM   #8
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Quote:
Originally Posted by mrk1 View Post
Thats a great looking option for a realistic brake upgrade. Do you run your car in the snow? My only reservation about a wilwood kit is no dust boots.

And WOW is that a lot of weight savings!
I'm in the Northern VA area now so not a lot of snow to worry about.


Quote:
Originally Posted by industrial View Post
Looks like everything went together great. Do you have any plans on track days or autocross? Would love to get your impressions on how these do with proper track pads and hard use. Dropping 32 pounds of rotating unsprung mass is huge man!
I'm doing Mid-Ohio June 10th. I'm hoping to make it to an autoX or out to Summit Point (road course) prior. I'm really waiting on my coilovers so I can put those on and my new wheels/tires. I've done some spirited driving with them but nothing heavy as far as track use. I think this will be good for the autocross guys and/or the HPDE/occasional track guys.
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Old 04-02-2013, 10:58 AM   #9
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I put a little more detail in my build thread but I should mention the reduction of up-sprung weight can be felt immediately. The car feels more direct on turn in and more responsive to the throttle. It doesn't necessary feel faster but it feels more responsive for sure. I'll be dropping another 11lbs off the front axle when I get my FA20Club header in. So with my current upgrades, I'll be running with 50lbs or so off the front axle. I'm sure this is something fantastic for the autocross types.
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Old 04-02-2013, 11:12 AM   #10
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This looks great and the weight saving is amazing... Will this change the break bias much?


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Old 04-02-2013, 11:14 AM   #11
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This looks great and the weight saving is amazing... Will this change the break bias much?


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I'm still on stock springs/struts and there is a bit more dive. I plan to upgrade the rears to stop tech slotted rotors, some pads, and SS lines when it's time to replace them. They feel a little more front bias but nothing that makes it feel unstable. Just a hint of more bias but the OEM set up used the fronts a lot too.
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Old 04-02-2013, 12:05 PM   #12
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Are the pistons sizes and disc diameter combination on this kit sized to ensure proper brake bias on the FT86? Do the discs actually have any additional thermal mass vs. the stock discs?

Slapping on parts designed for a different platform may actually hurt performance more than help. Obviously, the weight savings is great, but your stopping distances may actually increase instead of decrease vs. stock. That's not something you can easily determine through seat-of-the-pants testing. You need data acquisition or a radar gun to do so.

We are talking about one of the most critical safety items on your car folks, and I don't see a shred of evidence that any scientific design or actual testing went into this kit with regards to being used on the FT86. I've seen this sort of thing on other forums over the years, and threads like this make me nervous as h*ll. Please guys, be careful!
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Old 04-02-2013, 12:56 PM   #13
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^ The stopping distance is improved. I don't have any data but from a couple 30/60-0 tests they certainly stop quicker. As for the other questions, I'm not certain. The kit obviously wasn't designed for the BRZ, but being bigger and lighter is a plus for me. A lot of cars use the same rotors/calipers. My logic is if it can stop a 3300lb WRX faster, it should stop a 2700lb BRZ faster. However, specific to actual performance, I just have a feel, no data or extensive testing. The car still feels balanced, a slight bias to the front with the improved bite. It's light years ahead of stock, not sure how it stacks up to other aftermarket kits for the BRZ.
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Old 04-02-2013, 01:58 PM   #14
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Here is our 6 piston 12.88" rotor kit specifically designed for the FRS/BRZ/86 that fits inside the OEM 17" rims. http://www.wilwood.com/BrakeKits/BrakeKitSearch.aspx?year=2013&make=Scion&model=FR-S&option=All&whl=17

Install Video:

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