Wrong section, look for pre-2005 v6 since you've got a 3.8 (: BUT not sure if you want performance, or appearance mods or both so i'll just list some of both. Not too sure if you're asking for ideas, or looking for help with a mod you've purchased but here we go.
Most v6's on this site go with exhaust Cold air intake, coil packs, plugs and wires, gears, and a tuner. I've got everything on that list but the exhaust and tuner. You can also buy long tube headers i believe, not 100% on that though.
Appearance wise you can look into Tint, Chin spoiler, different body kits, tinted lights, sequential tail light kits, lowering springs, new wheels and stripe options.
Hope this helps a little bit, happy modding (: