99-04 calipers??

I had them before I got my 03 Cobras on. They save a significant amount of weight and do much better at stopping the car. I didnt think Id notice the difference but I did immediately and so will you. I still have them under a bench at my work in case I ever buy another stang with stock brakes.
 
I got a pair of front PBR calipers off a 2000 Mustang. I've been meaning to sell 'em, if you're interested PM me. These are two-piston calipers, and you will need to grind off part of your current spindles to get these to fit.

You can also pick up a set of 99-04 spindles to replace your own to avoid any grinding. Be aware that the 99-04 spindles will add a total of 3/4" to your front wheelbase. If you have the 03 Cobra a-arms as well, your wheels will stick out past your fenders.
 
I got a pair of front PBR calipers off a 2000 Mustang. I've been meaning to sell 'em, if you're interested PM me. These are two-piston calipers.

They're a mild upgrade over the stock calipers and weigh 9lb less. Worth it IMO though I think the Cobra 13" front brake kit is a better upgrade (I have it on my Stang).

you will need to grind off part of your current spindles to get these to fit.

Only a small amount of grinding needed around the bolt holes and definitely a better option than swapping on '99-'04 spindles. If you go for the '94-'98 Cobra front brake kit, you won't need to modify the spindles at all.