Questions on Dr. Diff 13" Cobra Style front brake setup

GMachineDartGT said
Are you sure they aren't cobra rotors, they are usually a bolt on. C4 rotors are thicker and usually use a slightly different version of the same caliper.

According to Cass they're C4 rotors. This is from an email he sent me...

The Cobra kit uses a 13 x 1.125" Corvette C-4 front rotor. The Brembo style kit uses a 13 x 1.25" Mercedes front rotor.

Both kits use the same hub, so the wheel register is 2.7".

Both kits increase the track width 3/16" per side compared to '73+ discs.

I recommend disc knuckles, because the caliper brackets are shorter and cleaner.

Thanks,

Cass

But that's all I'm going off of, I suppose I could see if there's a part # on my rotors somewhere.