Thread: Mustang brakes on w-body

My friend has a 2003 Mustang GT with 12" brakes, what would I need to swap his front brakes onto my 2000 GP?

If he gives them to me free/cheap I'll see if I can make them work.

Why go through all the trouble? There are 12" brakes avail for the GP that would probably be less hassle. Not necessarily cheaper than free if you get them for that, but free brakes with a bunch of extra parts to buy to make it fit may not pay off in the long run. Def. do your homework on this one. All else fails, get em for cheap and then flip them to a Mustang guy, and use the monies to buy what we know fits as noted below...

Slight upgrade for the 97-03 GP’s
A slight first upgrade for the 97-03 GP’s is to get the 04-08 GP’s Front Caliper and use their 12” rotors as well. The caliper bolts and banjo bolts are all exactly the same and everything bolts right in with the right rotor and pads. A reason this is a good upgrade is because going from a smaller diameter rotor to a larger diameter rotor is always a good improvement. A good analogy is this: Try to push open a door close to the hinge, and then try to open the door halfway out from the hinge and lastly push the door open at the opposite end from the hinge. Which was easiest? Well obviously the furthest point from the hinge. The same kind of principles occur with braking, the further the caliper is away from the center point the more efficiently the car can stop.
Good places to pick up this upgrade are either ZZP or W-Body Store. Or you can watch for used 04-08 calipers and piece this together yourself.

Moderate Upgrade for all GP’s except GXP
A good upgrade for all is the F-body upgrade. This is an upgrade that uses a 12” setup (grab 98-02 F-body Rotors) and using the calipers off of a 98-02 F-body V8/V6. This caliper is a dual piston sliding caliper. There are two options on picking the caliper, you can either A) just pick up F-body calipers and use them or B) Pick up Corvette C5/C6/Z51 Calipers which are also Dual piston sliding calipers, but you will also need to get the F-body caliper bracket (Part #: 18026163) as well as F-Body brake pads. The difference is negligible between the two; the corvette calipers have a smaller piston diameter and are supposedly stronger. You will also need the F-body banjo bolt.
Installing this setup has two options as well, A) drill the caliper brackets out and tap them so that you can use the GP’s caliper bracket bolts (this link talks about everything for this option: F-body Caliper and 12” Rotor Upgrade) or B) use a spacer bushing and use the F-body caliper bolts with the brackets (this link talks about everything for this option: Link Click Here). Option B is obviously cheaper and both options work well, I currently run Option B.
The stopping force is definitely an improvement over stock, I would recommend this option as a start for most, and this kit can be either pieced together using eBay or just pick up the whole kit from either ZZP or W-Body Store.
Lastly this upgrade can still fit 16” wheels with the correct offset.

Oh if they don't fit I'll just give them back to him (if he gives them to me free). It's not an upgrade I really want to do, it's just an option at the moment since his car is going to scrap once it's parted.

Well sorry (if anyone is following this thread) I decided to not even go through the hassle. Just painted my calipers and rusted parts of my rotors today. That'll be good enough.

http://www.grandprixforums.net/brake...tml#post988430