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Discussion Starter #1
Can anyone tell me the hub diameter on a cobra irs? Looking into a differant brake set up and am not in a good position to tear my car apart.

Thanks!
David
 

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I might be able to help you out but can you be a little more specific about what you are wanting? Are you talking the total outside diameter of the hub, or the center part of it where the rotor fits around or what?
 

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Discussion Starter #3
Total outside diameter is what I was asking for originally but if you can easily get the portion the center fits around that would be nice as well.

Thanks!
 

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T-Birds and Cobra's have the same outside diameter hub which is about 5.480"

The center portion of the Cobra rear hub is the same size as the center of your stock FRONT thunderbird hub which is about 2.75" at the base of the hub and has a slight taper to is as it extends outward.


The center of the rear t-bird hub is smaller than the Cobra. I just did the hub swap on my car and used my stock rear brakes. I redrilled my rear rotors for the mustang bolt pattern and had to machine the centers of my rear rotors to fit over the center of the cobra hubs.
 

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Discussion Starter #5
thanks for the help. do you happen to know on the tbird stock rear rotor, how far inwards the innermost surface of the disc is in relation to the surface that is flush with the hub?
 

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Sorry, not sure. What are you trying to do?

I don't know if what I did has anything to do with what you are doing, but I just did the hub swap on my car and still using all of my stock T-bird rotors.

I redrilled all 4 for the mustang patter, but had to machine the centers of my rear rotors to fit over the center part of the rear cobra hub.
 

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Discussion Starter #7
i used to work at a speed shop that built 9" ford rear ends for race cars/muscle cars. they had a cheap gm rear disc set up that had a much cleaner caliper bracket style. the ford style hits on weld wheels (unless you grind them) so I was looking to see if I could use a set of their disc's, calipers, and make a new caliper bracket.
 
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