I got a custom exhaust from Doug's. He built a custom y-pipe flowing into a 2-in-1-out cat with flex behind that and then 2.5" pipe with a custom y in the back to Magnaflow race series mufflers with 4" tips on each side. Here are the pics: http://atccsvt.homestead.com/ChucksExhaust.html

'98.5 silver SVT, #6226 of 6535,
24mm AAM "aussiebar", KKM intake, custom y-pipe w/ high flow cat,
custom cat-back w/ Magnaflow race series mufflers w/ 4" tips, Bosch
+4s, FMS 9mm blue wires, IAT mod, Bullit fuel door, 35% tint all
around, APC clear sidemarkers, PIAA 510 driving lights, Cuzo
headlights, "carbon" sail panels, chopped shifter w/ Richbrook knob,
OBX pedal pads, "Bluepoint" Key Largo HU, Pioneer TS-A6955 6x9 3-way speakers in the doors, Precision Power PPI2240 amp, Xtant X410 10" sub in bandpass enclosure.