CTSV Brembo brake swap

[Squid1236]

Has anyone used the CTSV Brembo front brake swap kit for Subaru hubs. Been looking at it for the fronts and STI in the rear but they say you have to grind the top of the caliber down to clear 17 inch rims or run 18 inch rims. I really like the setup just wanted to get everyones opions on who may have tried it pros cons. Thanks.

[Bob_n_Cincy]

Has anyone used the CTSV Brembo front brake swap kit for Subaru hubs. Been looking at it for the fronts and STI in the rear but they say you have to grind the top of the caliber down to clear 17 inch rims or run 18 inch rims. I really like the setup just wanted to get everyones opions on who may have tried it pros cons. Thanks.

Squid,
Seeing your post, I investigated. No one on this forum has talked about the CTSV swap before.
I am using heavy OEM impreza front calipers on all four wheels. So this is a swap that can save me a bunch of un-sprung weight.
The OEM impreza, Subaru 4 pot, brembo, willwood, and now CTSV all have about the same size pistons. So the same squeezing force per pedal force.
The big advantage I see for me is the coast and weight.
The disadvantage of the CTSV kit is requiring 18" wheels.

What is the best price you have found for the calipers?
Rockauto is $127.79 each. I think that is a great price.

http://www.rockauto.com/en/moreinfo.php?pk=3943410&jsn=254


Bob

[Squid1236]

Believe it or not Amazon $93/left $107/right

[NevaLift2Shift]

Squid,
Seeing your post, I investigated. No one on this forum has talked about the CTSV swap before.
I am using heavy OEM impreza front calipers on all four wheels. So this is a swap that can save me a bunch of un-sprung weight.
The OEM impreza, Subaru 4 pot, brembo, willwood, and now CTSV all have about the same size pistons. So the same squeezing force per pedal force.
The big advantage I see for me is the coast and weight.
The disadvantage of the CTSV kit is requiring 18" wheels.

What is the best price you have found for the calipers?
Rockauto is $127.79 each. I think that is a great price.

http://www.rockauto.com/en/moreinfo.php?pk=3943410&jsn=254


Bob

That's about $120 cheaper than what I paid for my reman'd Subaru 4 pot calipers from Rock Auto. There is no core charge either, that's a damn good deal!

[Squid1236]

Check this site it has the braket and part numbers also there are YouTube videos on this.
CTSVbrakeswap.com

[Mitch Wright]

With some work anything will fit, why not look at the Camaro 4 pot? Not as cool as the 6 pot but would think they would be more than adequate. I have a new set here if you need measurements.

[Squid1236]

The camaro brakes are simular to the ctsv but the ctsv actually fit the camaro wont even with 18 inch rims and the camaro are more expensive

[fastzrex]

Fantastic! Ant idea how you have to grind to fit in a 17" wheel?



Has anyone used the CTSV Brembo front brake swap kit for Subaru hubs. Been looking at it for the fronts and STI in the rear but they say you have to grind the top of the caliber down to clear 17 inch rims or run 18 inch rims. I really like the setup just wanted to get everyones opions on who may have tried it pros cons. Thanks.

[Squid1236]

Thats what one of the YouTube videos said it contacted the 17 inch rim and required grinding

[Hobby Racer]

I have done the CTS-V Brembo swap on the front and rear of my 818R. I do not have the car running yet but the spindles w/ brakes are complete. Very impressed with the setup and the price. They fit the FFR 17" wheels using a 3mm spacer. The FFR 18" rears fit with plenty of room. These brakes are huge! I ran the calculations and they provide a near perfect balance front to rear and require only 44 lbs of pedal pressure under max deceleration. I am using the Wilwood pedal setup and staggered master cylinders, 3/4" front, 13/16" rear.

I had to fabricate custom rear brackets to fit the Cadillac ATS-V Brembo calipers.

62851628526285062853

[Squid1236]

Thank youwanted to know if it worked.

[Mechie3]

With some work anything will fit, why not look at the Camaro 4 pot? Not as cool as the 6 pot but would think they would be more than adequate. I have a new set here if you need measurements.

Same brakes? These are the older CTS-V four pots, not the newer 6 pot ones AFAIK.

[Squid1236]

Its the ATS 2015 brakes

[Hobby Racer]

Its the ATS 2015 brakes

Yes 4 pot, 42mm pistons from ATS-V (Brembo package)

[Squid1236]

These are what bolts up with the kit

[Hobby Racer]

These are what bolts up with the kit

Yes, I'll post pics of the front and rear spindle assemblies tomorrow.

[Squid1236]

Ok thanks that will help alot

[Mechie3]

I have done the CTS-V Brembo swap on the front and rear of my 818R.

I had to fabricate custom rear brackets to fit the Cadillac ATS-V Brembo calipers.


I'm confused. Did you use the CTS-V or the ATS-V...or are they the same?

[Squid1236]

It is the same they call the system ATS now

[Mechie3]

It is the same they call the system ATS now

I think people need to clarify if they're using CTSV v1 or V2 brakes. I know several people like the Version 1 (v1) CTS V brakes as an upgrade.

Stock Legacy, left, Sumitomo (simliar to JDM 4 pot 06/07 4 pot), and V1 CTS-V
https://static1.squarespace.com/static/533e04ece4b0600fcd341a79/535fc818e4b0faf273410dbb/53bb507be4b0819b35799ad3/1452460611731/14564738033_3bff3f5695_o.jpg?format=500w

The CTS-v version 2 (V2) are the 6 piston and much different in size. The ATS-V is the same as the V2 CTS-V.

V1 (gold) next to V2 (yellow)
http://www.submariner.org/thepno95/Pictures/CTS-V%20pics/Suspension%20and%20Chassis/V2%20brakes/V2%20fronts1.jpg

[Hobby Racer]

The CTS-V gen 1 and gen2 calipers are not the same as the ATS-V calipers. They are very similar but are different GM part numbers. The kit is designed to use ATS-V calipers.

Here are the instructions they ship with the kit, part numbers and descriptions are on pg5.

6289762898628996290062901

[Mechie3]

Cool. Didn't know there was an actual kit. I thought most people did it DIY. I was reading a cadillac forum today at lunch and it showed different pics for the ATS-V calipers that looks different than the pics you posted.

[Brett33]

So reading the instructions I am still confused! You use the ctsv brake pads but the Atsv calipers?
Brett

[UnhipPopano]

If I understand what Hobby did was to use the kit for the Front and built special brackets for the rear. Is there any pictures of this? Does the brackets still require the GMC mounting kit? As the wheel spacers push the wheels out, is the wheel selection impacted?

[Hobby Racer]

Here is the front spindle assembly with the ATS-V Brembo calipers. The fronts use the CTS-V Brake Swap kit (http://www.ctsvbrakeswap.com/) to mount them.

6290662907

Here is the rear spindle with the same ATS-V Brembo calipers. The rear did require DIY mounting brackets be made.

6290862909

[Hobby Racer]

So reading the instructions I am still confused! You use the ctsv brake pads but the Atsv calipers?
Brett

Yes

[Hobby Racer]

Does the brackets still require the GMC mounting kit?

The front kit is complete, no other mounting parts are required.


As the wheel spacers push the wheels out, is the wheel selection impacted?

Depends on your wheel selection. As I said the FFR 17" wheels fit using a small 3mm spacer. I used a 5mm for extra room.

[UnhipPopano]

Looking at this picture, how do you get the long bolt in as well as the two arms?

http://thefactoryfiveforum.com/attachment.php?attachmentid=62909&d=1484776848

[Hobby Racer]

Looking at this picture, how do you get the long bolt in as well as the two arms?

http://thefactoryfiveforum.com/attachment.php?attachmentid=62909&d=1484776848

The angle of the pic does not show the amount of room between the caliper and spindle. The lower bolt slides in fine.

[Hindsight]

Does this allow for a working e-Brake?

[Hobby Racer]

Does this allow for a working e-Brake?

Race cars don't usually have parking brakes ;)

I used the same STI rotors on the front and rear so there is no inner drum setup for the parking brake.
Great thing about my setup is the front and rear use the same rotors, pads and calipers. Makes stocking spares super easy and cheap!

[mikeb75]

great info here, thanks!

[JeromeS13]

Race cars don't usually have parking brakes ;)

I used the same STI rotors on the front and rear so there is no inner drum setup for the parking brake.
Great thing about my setup is the front and rear use the same rotors, pads and calipers. Makes stocking spares super easy and cheap!

I would prefer to have one in a racecar. If you have a complete brake failure on track, it can at least slow you down a bit and reduce overall damage and/or provide more time for action.

[Hindsight]

I drive mine on the street a lot so need a working parking brake. I also agree that it's a great backup on the track.

I do like the CTSV brake idea though! I bet you could come up with an alternative to an e-brake like a line-locker or something like that. It would work better as a parking brake than an "emergency" brake though, since it would be hydraulically actuated.

[Samiam1017]

does anybody make a 12.8in rear rotor for 02-07 wrx fitment?

[FFRSpec72]

I drive mine on the street a lot so need a working parking brake. I also agree that it's a great backup on the track.


I need mine on the track for drifting

[STiPWRD]

does anybody make a 12.8in rear rotor for 02-07 wrx fitment?
Best I could find was 12.44" (316 mm)
http://www.fastwrx.com/collections/brake-rotors/products/dba-4000-series-sti-adapter-rotor

[Samiam1017]

Best I could find was 12.44" (316 mm)
http://www.fastwrx.com/collections/brake-rotors/products/dba-4000-series-sti-adapter-rotor

could probably use willwood hats and order a set of there rotors that size. would be cheaper in the long run when you need rotors replace.

[Bob_n_Cincy]

does anybody make a 12.8in rear rotor for 02-07 wrx fitment?
I'm using these 12.44 in the rear with front calipiers.
Bob

http://thefactoryfiveforum.com/showthread.php?12534-MRG-MotorSports-818S-Build&p=218828&viewfull=1#post218828

[Samiam1017]

I'm using these 12.44 in the rear with front calipiers.
Bob

http://thefactoryfiveforum.com/showthread.php?12534-MRG-MotorSports-818S-Build&p=218828&viewfull=1#post218828

im following your lead and doing this also.

[EODTech87]

Any idea if the CTS-V calipers will be able to run a 20mm rotor?

[Mechie3]

Several people now have approached me and asked me to make some rear brackets. I'm slow to get things done now, but I'll take a look at it (along with a fun twist ;) )

[Hindsight]

I hope the twist includes a way to have a parking brake lol

[EODTech87]

You can either run the adapter calipers that bob posted or KNS sells a thick set of brake shoes to make the WRX parking brake work with a sti rear rotor. That still limits you to a 20mm thick rear rotor. I've been trying to find a piston parking brake that will fit a 30mm front sti rotor but haven't found anything that will support something that large.

[Mechie3]

I'd like to see if the wilwood mechanical caliper can be mounted for parking. It can take up to a 20.5mm rotor.

[EODTech87]

Should work just fine with the sti rear rotor but not with the front like hobby racer did.

[Hobby Racer]

If you want a parking/emergency brake that would work with the wider STI front rotors, you could use one like this from wilwood. (http://www.wilwood.com/Calipers/CaliperProd.aspx?itemno=120-6427)

63242

[EODTech87]

That would work would just have to run a hydraulic hand brake

[STimedic]

Hmmmm....it would be interesting to find a push-button hydraulic line-lock that activates only the front brakes.....

[Scargo]

... Stock Legacy, left, Sumitomo (simliar to JDM 4 pot 06/07 4 pot), and V1 CTS-V
https://static1.squarespace.com/static/533e04ece4b0600fcd341a79/535fc818e4b0faf273410dbb/53bb507be4b0819b35799ad3/1452460611731/14564738033_3bff3f5695_o.jpg?format=500w


What are the diameters of these three?

[UnhipPopano]

What year is the Legacy brake disk, and is it only 4 wheel studs?

https://static1.squarespace.com/static/533e04ece4b0600fcd341a79/535fc818e4b0faf273410dbb/53bb507be4b0819b35799ad3/1452460611731/14564738033_3bff3f5695_o.jpg?format=500w

[Mechie3]

What are the diameters of these three?

No idea. Random internet search photo.

[Scargo]

Ah! Hobby Racer! What size are they?* I have Stoptechs that are 12.9" and they fit inside my 17 inch Wedssport TC105N's .
*I've been plowing snow for five hours and feel too lazy to search the internet!

[Hobby Racer]

Ah! Hobby Racer! What size are they?* I have Stoptechs that are 12.9" and they fit inside my 17 inch Wedssport TC105N's .
*I've been plowing snow for five hours and feel too lazy to search the internet!

They are 12.83" (326mm) and they fit inside FFR's 17" wheels.