So, for the past month or so I have been measuring and comparing between the Cobalt SS/TC and my malibu. I was considering buying the brembo brakes from a cobalt to put on my car, but now I have decided to just leave it alone. Either way I thought I would share what I have found so far if someone wants to try to see if it works for sure.
I am basing this off an LTZ malibu with the wheel design in my sig pic.
Cobalt SS wheels: Offset +42MM, w/diameter 18", width 7.5", bolt pattern 5x110
Malibu LTZ wheels: Offset +41MM, w/ diameter 18", width 7", bolt pattern 5x110"
Cobalt hub center OD: 2.5" diameter
Malibu hub center OD: 2.5" diameter
Cobalt SS rotor thickness new: 1.023"
Malibu rotor thickness new: 1.023"
Cobalt SS rotor diameter: 12.4"
Malibu rotor diameter: 11.6"
Cobalt caliper mounting bracket center to center: 4 7/8"
Malibu caliper mounting bracket center to center: 4 7/8"
There are some things I have not been able to compare yet though. I can't remember if the cobalt ss wheel design from behind is much different from the LTZ malibu wheel for clearance. From the looks of it there would be plenty of clearance, but I am not sure. I haven't been able to find the overall height of the rotor to compare (bottom of the rotor to the top of the rotor).
Basically what would have to be changed out is the calipers, rotors, pads, banjo washers, and brake hoses (from the caliper to the body since the mounting angle is different at the caliper).
The main benefit of this swap would be better stopping power. The Cobalt SS/TC Brembo brakes are 4 piston calipers with a larger rotor diameter. The malibu front brakes are only one piston calipers with a smaller diameter. I think it would work well to stop the heavy malibu a lot better over just swapping pads and rotors to aftermarket.
Again this is all I have found, but I have not tested to see if this would work or not. I think it would, but there may be something that I am missing. I just wanted to share what I have found and maybe someone has better resources to see if it will actually work. It is a long shot, I know, but since there is no aftermarket support for the malibu this is the only way I can find what will work.