2003-04 Mustang Cobra Brake Conversion

It’s pretty simple.

On a 2003 GT, all you need are a pair of 13” cobra rotors and a set of 99-04 loaded Cobra calipers complete with pads.

You do not need new soft brake lines. You can replace yours if they are old and you want fresh ones.

You do need specific banjo bolts for the cobra calipers. The GT ones are too long and hit the piston. Test fit then before starting as there is a coarse and fine version.

When you bleed the brakes, don’t forget to bleed the two bleeders on the master cylinder as well.

Make sure you have 17” wheels, and keep in mind your spare tire no longer fits the front.

Good luck. Its a fun mod

Ah yes, there are kits. I'll be honest, you can prob get it cheaper sourcing it from Rockauto.com



You don't need the front brake hoses on a 99-04 car. They are all the same, but never a bad idea to swap out 20-25 year old rubber components.