Mar 6, 2015, 01:35 PM
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C4 Brake Upgrade c5 vs c6
Le Mans Master
Joined: Oct 2007
Posts: 9,658
Likes: 3,355
From: Akron Ohio
2025 Corvette of the Year Finalist - Modified
2024 C5 of the Year Winner - Modified
2023 C5 of the Year Finalist - Modified
2022 C5 of the Year Finalist - Modified
St. Jude Donor '09-'10-'11
Anything is possible, but probably not worth it. The C5/6 upper ball joints are upside down compared to the C4 so you would need a new upper control arm as well. It would be easier to make a caliper fit the C4 knuckle.
I put Viper 4 piston brembos on my car with C6 Z06 14" rotors. It was a pretty simple bracket too.
I put Viper 4 piston brembos on my car with C6 Z06 14" rotors. It was a pretty simple bracket too.
Pro
Joined: Mar 2013
Posts: 697
Likes: 161
From: Huntington WV
You are correct, the mount holes are not the same. An extra set of adapter plates are required to interface between the C4 spindles and the C5 brackets. That + the requirement to use larger wheels drove the cost up too high for me. I just used the setup I posted above and am happy.
Team Owner
Joined: Sep 2003
Posts: 25,330
Likes: 2,722
You can use also the Mustang brackets but they would need machined for the 14mm hardware.
Pro
Joined: Aug 2012
Posts: 663
Likes: 1
From: Nashville TN
I bought out some brake parts from a shop and ended up with 6 sets of these calipers and brackets, several rotors, and some other little stuff. There are no more available where I got mine. Mine are lacking any markings other than the PBR patent numbers. The Mustang PBR brakes say COBRA on them where the GS calipers say CORVETTE. Mine are identical to the GS calipers in every way except color and markings. I've also seen them with BAER and SSBC. I have the correct Corvette brackets that have a fancy zinc finish.
I still have 2 sets of the calipers/brackets for sale in the sale section.
I still have 2 sets of the calipers/brackets for sale in the sale section.
Team Owner
Joined: Sep 2003
Posts: 25,330
Likes: 2,722
I bought out some brake parts from a shop and ended up with 6 sets of these calipers and brackets, several rotors, and some other little stuff. There are no more available where I got mine. Mine are lacking any markings other than the PBR patent numbers. The Mustang PBR brakes say COBRA on them where the GS calipers say CORVETTE. Mine are identical to the GS calipers in every way except color and markings. I've also seen them with BAER and SSBC. I have the correct Corvette brackets that have a fancy zinc finish.
I still have 2 sets of the calipers/brackets for sale in the sale section.
I still have 2 sets of the calipers/brackets for sale in the sale section.
Race Director
Joined: Sep 2001
Posts: 14,621
Likes: 748
From: NEwhere Ohio
Anything is possible, but probably not worth it. The C5/6 upper ball joints are upside down compared to the C4 so you would need a new upper control arm as well. It would be easier to make a caliper fit the C4 knuckle.
I put Viper 4 piston brembos on my car with C6 Z06 14" rotors. It was a pretty simple bracket too.
I put Viper 4 piston brembos on my car with C6 Z06 14" rotors. It was a pretty simple bracket too.
Thumbs up kubs!
Suckin' gas, haulin' ass.
Joined: Apr 2010
Posts: 1,100
Likes: 8
From: Newport News Virginia
Anything is possible, but probably not worth it. The C5/6 upper ball joints are upside down compared to the C4 so you would need a new upper control arm as well. It would be easier to make a caliper fit the C4 knuckle.
I put Viper 4 piston brembos on my car with C6 Z06 14" rotors. It was a pretty simple bracket too.
I put Viper 4 piston brembos on my car with C6 Z06 14" rotors. It was a pretty simple bracket too.
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Pro
Joined: Aug 2012
Posts: 663
Likes: 1
From: Nashville TN
1990s Mustang GT calipers
Several companies appear to use these same calipers. If anything, mine look closer to the Baer than any of the others.
Mine fit a Corvette
Last edited by bassackwards; Mar 20, 2014 at 09:56 AM.
Le Mans Master
Joined: Oct 2007
Posts: 9,658
Likes: 3,355
From: Akron Ohio
2025 Corvette of the Year Finalist - Modified
2024 C5 of the Year Winner - Modified
2023 C5 of the Year Finalist - Modified
2022 C5 of the Year Finalist - Modified
St. Jude Donor '09-'10-'11
Thank you!
For anyone looking to upgrade brakes these are <$300 each form the dealer (less than Wilwood or C6Z calipers) but I got them used pretty cheap. They also use an 18mm thick pad instead of the C5/6 16mm pad, and the axle set is $40 cheaper than C5/6 front pads (on the carbotech compounds I use). They are slightly larger volume but very close to the C5/6 calipers so brake bias would be similar to those. I did it for racing purposes, but they look cool for street guys looking to upgrade as well.
Suckin' gas, haulin' ass.
Joined: Apr 2010
Posts: 1,100
Likes: 8
From: Newport News Virginia
They are from a GenIII Viper so like '00-'08 or something. I thought about the double shear, but every OEM and aftermarket caliper bracket is single shear as well so I dont see an issue with it. Plus its lighter!
Thank you!
For anyone looking to upgrade brakes these are <$300 each form the dealer (less than Wilwood or C6Z calipers) but I got them used pretty cheap. They also use an 18mm thick pad instead of the C5/6 16mm pad, and the axle set is $40 cheaper than C5/6 front pads (on the carbotech compounds I use). They are slightly larger volume but very close to the C5/6 calipers so brake bias would be similar to those. I did it for racing purposes, but they look cool for street guys looking to upgrade as well.
Thank you!
For anyone looking to upgrade brakes these are <$300 each form the dealer (less than Wilwood or C6Z calipers) but I got them used pretty cheap. They also use an 18mm thick pad instead of the C5/6 16mm pad, and the axle set is $40 cheaper than C5/6 front pads (on the carbotech compounds I use). They are slightly larger volume but very close to the C5/6 calipers so brake bias would be similar to those. I did it for racing purposes, but they look cool for street guys looking to upgrade as well.
Thanks a ton.
Le Mans Master
Joined: Oct 2007
Posts: 9,658
Likes: 3,355
From: Akron Ohio
2025 Corvette of the Year Finalist - Modified
2024 C5 of the Year Winner - Modified
2023 C5 of the Year Finalist - Modified
2022 C5 of the Year Finalist - Modified
St. Jude Donor '09-'10-'11
I will try to get some pictures of the fitment. I use OEM FRONT C6Z wheels with no spacers. 18x9.5 with a 40mm offset. I don't think 17" wheels will clear.
Race Director
Joined: Feb 2008
Posts: 19,691
Likes: 320
From: Alexandria VA
Sorry to hijack your thread but I'm looking for some confirmation.
I have an '84 that's a dedicated track car. I planned on changing the uprights to either an '85, '86, or '87 upright where the differences between is weather or not is has an ABS provision. I then planned on utilizing some of the brackets you can buy (or make) and utilizing a C5 or C6 (non z06) package. Other than requiring larger wheels for clearance, this is the way to do it, correct?
Thanks!
I have an '84 that's a dedicated track car. I planned on changing the uprights to either an '85, '86, or '87 upright where the differences between is weather or not is has an ABS provision. I then planned on utilizing some of the brackets you can buy (or make) and utilizing a C5 or C6 (non z06) package. Other than requiring larger wheels for clearance, this is the way to do it, correct?
Thanks!
Team Owner
Joined: Sep 2003
Posts: 25,330
Likes: 2,722
Sorry to hijack your thread but I'm looking for some confirmation.
I have an '84 that's a dedicated track car. I planned on changing the uprights to either an '85, '86, or '87 upright where the differences between is weather or not is has an ABS provision. I then planned on utilizing some of the brackets you can buy (or make) and utilizing a C5 or C6 (non z06) package. Other than requiring larger wheels for clearance, this is the way to do it, correct?
Thanks!
I have an '84 that's a dedicated track car. I planned on changing the uprights to either an '85, '86, or '87 upright where the differences between is weather or not is has an ABS provision. I then planned on utilizing some of the brackets you can buy (or make) and utilizing a C5 or C6 (non z06) package. Other than requiring larger wheels for clearance, this is the way to do it, correct?
Thanks!
Le Mans Master
Joined: Oct 2007
Posts: 9,658
Likes: 3,355
From: Akron Ohio
2025 Corvette of the Year Finalist - Modified
2024 C5 of the Year Winner - Modified
2023 C5 of the Year Finalist - Modified
2022 C5 of the Year Finalist - Modified
St. Jude Donor '09-'10-'11
There is a little more than 1/8" spoke clearance:
The inside has a little less than 1/2". 17" wheels would be a super tight fit.
Suckin' gas, haulin' ass.
Joined: Apr 2010
Posts: 1,100
Likes: 8
From: Newport News Virginia
thanks for all the pics, exactly what I was looking for!
Le Mans Master
Joined: Oct 2007
Posts: 9,658
Likes: 3,355
From: Akron Ohio
2025 Corvette of the Year Finalist - Modified
2024 C5 of the Year Winner - Modified
2023 C5 of the Year Finalist - Modified
2022 C5 of the Year Finalist - Modified
St. Jude Donor '09-'10-'11
That looks awesome. Looks like I'll have to do this mod in the future, sure way to get cheap 14" brakes and Brembos. Now I just need to find an 18x11" wide wheel with the correct offset to fit the 315s on the back
thanks for all the pics, exactly what I was looking for!
thanks for all the pics, exactly what I was looking for!
