The y-pipe is a great mod. I have a used one for sale, PM me if your interested. It's the offroad pipe with no catalytic.

Vinny 2000 T-RED CSVT MODS: 18" REV model 2 ST200 struts/Roush springs CTA intake Pipe/K&N Filter Dtec Heatshield Optimized TB True Duals w/ magnaflow mufflers/resonators