it's not in the "NoVa" area so to speak, but try out Import Sports in Glen Burnie, MD. they do it all. great guys, reasonably priced. i used to go there all the time with my Jetta when i lived up in baltimore, then went there with my ZX3, and now go there with my ZTS. they do everything, all cars.

i'd do the headers myself though. that's one of those jobs that it doesn't take a brainiac to do. just need some good jackstands and a few hours of your day.