Join Date: Oct 2000
Location: Baton Rouge, La,USA
When I did the Cobra/SN95GT swap on my old Fox, I went with stainless braided lines in the front and kept the rubber out back. I also added the Cobra MC and BB (which is a bit of a PITA to get in) because the stock Fox power system is not sufficient. That new setup made a HUGE difference. The other part you need to worry about is the stock rear proportioning valve. The one on the FOX does not allow near enough pressure to the rear to all make the rotor/caliper setup functional. I removed mine completely and put a Wilwood proportioning valve in the line on the passenger side firewall. For all instances, except open track, i ran the Wilwood valve wide open to the rear brakes. Now granted, I had the 13" setup in the front which required little brake pressure so rear lockup was not a problem. With the 99-04 GT setup in the front, you will need a little more pedal effort. Just tune the rear brakes to not lock before the fronts and you should be good to go.
In the front, the 99-04 (dual piston) calipers differ from the 94-98 (single piston). In the rear, they are same.
2011 Mustang GT 5.0
Sterling Metallic Gray, Charcoal Interior, Brembo Pkg., 3.73's
SOLD:1999 Mustang GT SMC # 37
Dyno: 482RWHP/465RWTQ @ 13psi