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Old 02-09-2012, 06:00 PM   #1
proxses
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The Proxses Tuning Brembo Conversion Kit

Hello all, Quiksilver and I have been working on some details of the kit and due to the clutter of the old thread, this new one will hopefully clarify things.

Here goes!

What is the PTBCK?
This kit consists of the custom components needed to mount the Brembo calipers from a G8 GXP, Camaro SS, or 2004-2007 CTS-V to the GTO.



What comes in the kit?
For $212 you get:
Two (2) Caliper Mounting Brackets
Two (2) Rotor Centering Rings
Four (4) Bracket Bolt Size Adaptors (2004 cars only)

What else do I need?
You'll need these parts to finish the kit:
Left Front Brembo Caliper
Right Front Brembo Caliper
Brembo Caliper Hardware Kit (2 needed)
CTS-V Caliper Bolts (4 needed)
2002-2006 BMW E65 745i Front Rotors
2004-2007 CTS-V Brake Pad (your choice)

What kind of lead time?
Lead time is determined by the demand for this kit and production capabilities, I will update this as needed.

How easy is it to install?
Review this installation guide and you can decide for yourself!
www.proxsestuning.com/Brembo.pdf

How do I order?
Go to http://www.proxsestuning.com/apps/we...s/show/2901850
Be sure to specify your correct GTO year when ordering.

Will you be making a rear kit?
There are currently no plans for a rear BBK due to the complexity added by the e-brake. A Brembo 4-piston front and our factory 1-piston rear is identical to the setup used on the G8 GXP.

Will this work with my factory master cylinder?
Yes, there will be no issues with the ABS or OEM master. You may notice a slightly stiffer pedal.

Will 2009-2011 CTS-V Gen2 6-piston calipers work with this?
No, the 6-piston CTS-V caliper needs a larger rotor and as such would use a different offset rotor than the BMW one chosen. This adaptor kit only works with the 4-piston Brembo calipers as noted above.

What kind of wheels will this kit fit?
General rule is anything 18" and up. We're currently working on a fitment printout that you can use at home on your wheels to confirm. Please give us just a few more days.
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Old 02-09-2012, 06:48 PM   #2
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First!

Linked to aforementioned cluttered thread: http://www.ls1gto.com/forums/showthread.php?t=431874
10 days old, 5k+ views = cluttered

Caliper & misc group buy thread: http://www.ls1gto.com/forums/showthread.php?t=432297
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Old 02-09-2012, 06:53 PM   #3
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wicked awesome!
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Old 02-09-2012, 06:59 PM   #4
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Calipers/Hardware Kit/ CTSV Bolts Group Buy Here: All for $374.10 +Shipping
http://www.ls1gto.com/forums/showthr...297&highlight=

Hope you dont mind Proxes but I thought it might help people pull the trigger
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Old 02-10-2012, 06:59 AM   #5
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will be placing an order as soon as my tax return deposits. thanks for putting this together for us.
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Old 02-10-2012, 02:00 PM   #6
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Proxses-
thanks for the clearer new thread, and the details.
i opened the link for the installation instructions, and saved it for when i get the rest of the parts. the link called "instructions" to bleed the calipers, for some reason, is not working for me.

oh! i received the sleeves. thanks!
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Old 02-12-2012, 07:22 PM   #7
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Sorry I missed that, I'll work with Mike to get the instructions detailed. We threw them together pretty quickly the other night and they need more detail anyways.

I believe Proxses has enough tracking capability that anyone who ordered the brackets will get an updated v1.1 install instructions file via e-mail later.
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Old 02-13-2012, 08:19 AM   #8
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Proxses, sent you a PM.
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Old 02-13-2012, 09:00 AM   #9
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I think I finally have my parts list finalized. Will likely start ordering the rest of the stuff this evening. Ordering from 5-6 diff places lol
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Old 02-14-2012, 04:56 AM   #10
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One more question: What king of improvement will this yield stock for stock? (i.e. no racing pads?)
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Old 02-14-2012, 07:55 AM   #11
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Realistically? Same stopping distance as stock.

You do get more repeatability with the Brembos, and based on Konnie the Goat's initial calculations, a slightly stiffer pedal.
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Old 02-14-2012, 11:36 AM   #12
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What do you mean by repeatability? Decreased fade? The stiffer pedal is due to less piston surface area, correct?
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Old 02-14-2012, 01:14 PM   #13
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One of the main reasons I've been looking into this upgrade is because I think the BMW rotors will be more durable than factory GTO rotors. They have thicker pad contact surfaces, so in theory, they should be less prone to warping.
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Old 02-14-2012, 01:26 PM   #14
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Quote:
Originally Posted by seawolf06...View Post
What do you mean by repeatability? Decreased fade? The stiffer pedal is due to less piston surface area, correct?

Yes, decreased fade. Typical 70-0 stopping, you'll see about the same distance because you've already got a braking system capable of out-powering the tires. Where bigger rotors and calipers shine is high-speed braking where large amounts of heat are generated.

The stiffer pedal is due to the travel of the pistons on both ends versus one end. Half the travel distance.
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Old 02-14-2012, 03:19 PM   #15
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IM doing it for looks, the fade resistancy and im hoping my brakes dont start shaking every 10,000 miles like my stock ones did with all pads and rotors ive tried.
I also would like a stiffer pedal.

My stock brakes would not outpower my front tires when i have my summer tires on.
Both my star spec direzzas and nt05 nittos would not lock up under full brake pressure.. so i think i will gain some stopping distance personally. They easily lock up my snow tires lol
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Old 02-15-2012, 01:56 PM   #16
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i can't tell that the pedal is stiffer. there is no brake fade from the 160 mph runs that i have made. gets you back to 60 real quick. took about 100 miles to get pads and rotors worn in. can tell a big change in way car stops now.
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Old 02-17-2012, 11:41 AM   #17
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Just as another incentive: When I purchased my calipers (ebay) they came with all the hardware except rotors for under $600 (I bought a set of four: front and rear). This kit is the way to go!

Last edited by GrumpyGoat; 02-17-2012 at 11:44 AM.
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Old 02-18-2012, 01:26 PM   #18
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The brackets r ready to ship again?
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Old 02-19-2012, 10:21 AM   #19
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I really need to know if the calipers stick past the face of hub were the wheel mounts!
Has anyone done there install yet that can check? Prox is never on to answer questions
IM tempted to goto a local auto parts store and start taking measurements

Last edited by sporaclic; 02-19-2012 at 10:25 AM.
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Old 02-19-2012, 11:51 AM   #20
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Welp, here's the rotors I went with. I like the fact the slots vent out all the way to the edge, not bad, 13.7 inch slotted for 120 bucks shipped!(some revshift motor mounts in the pic too):

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Old 02-19-2012, 02:59 PM   #21
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is the caliper going to stick passed the rotor? do you have the caliper to hold up and kind of judge?
It doesnt look like the rotor is as deep in as a stock gto rotor
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Old 02-19-2012, 03:02 PM   #22
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Ducky can you post pictures of the setup on car?
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Old 02-19-2012, 03:22 PM   #23
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Quote:
Originally Posted by sporaclic...View Post
I really need to know if the calipers stick past the face of hub were the wheel mounts!
Has anyone done there install yet that can check? Prox is never on to answer questions
IM tempted to goto a local auto parts store and start taking measurements

I don't have parts here to measure. I'd like to help, but the first install was not done at my shop.
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Old 02-19-2012, 04:55 PM   #24
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Quote:
Originally Posted by sporaclic...View Post
is the caliper going to stick passed the rotor? do you have the caliper to hold up and kind of judge?
It doesnt look like the rotor is as deep in as a stock gto rotor

depth appears to be identical to stock, I think the beveled edge to clear larger calipers on the bmw rotors gives an illusion of less depth but they are so close upon inspection I didn't even bother with a tape measure.





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Old 02-19-2012, 05:33 PM   #25
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Thanks! Thats good news, hopefully the caliper doesnt stick out passed the face.. as long as its set back about 3/4" i think ill have the clearence i need

Last edited by sporaclic; 02-19-2012 at 06:21 PM.
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Old 02-19-2012, 06:14 PM   #26
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Great looking kit Proxses! Wish i was in the market for breaks right now. Currently have the 06 calipers and 06 rotors on my 04.. might have to check this out further.
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Old 02-20-2012, 06:22 PM   #27
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Rotor dimensions:

GTO:


745:
Attached Images
File Type: jpg 2006 GTO.jpg (140.5 KB, 2929 views)
File Type: jpg 2005 745i.jpg (130.3 KB, 2923 views)
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Old 02-20-2012, 06:40 PM   #28
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And some helpful part numbers:

Rotors - Centric (aka PowerSlot, Stoptech) are 12x.34064Sx. The first 3 digits of their part numbers indicate the rotor type:
120 = stock replacement
121 = C-Tek (?)
125 = high carbon
126 = slotted
127 = slotted and drilled
128 = drilled

The suffix will be SL or SR, but may also have a C indicating cyro treated - CSL or CSR.

Hawk ceramics = HB453Z-585
Hardware kit = Carlson H5811
Calipers = ACDelco 172-2287, 172-2288.

Do some searches and you can find the parts cheaper than I've seen posted yet - i.e.: calipers $230, rotors $230, hardware $22, pads $100.
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Old 02-20-2012, 06:58 PM   #29
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According to the V guys, this is the caliper, just radial vs axial mount.

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Old 02-20-2012, 07:28 PM   #30
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Nice info guys! I'm trying to find the width of the whole caliper or the amount of caliper that sticks passed the rotor face... I think I'm seeing a 53mm for half but it don't look like its going all the way to the edge of the caliper.

How is that BMW rotor a weight reduction lol
So is "hub reg" the amount of hat sticking passed the rotor face? Its the only statistic I see that is close to the measurement I had for the got rotor
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