not legal, it will be hard to find a shop to do that, furthermore, other than the test pipe, the rest of the stock exhaust is very restrictive. yoou want a mandrel bent system with a good set of free flowing muffs. look into the hooker system which includes everything from the downpipe back. it costs $300 and is the single best mod that you can do to one of these cars. just the change in exhaust to the above was worth .5 on my car. change out the fuel pump and you have the basic platform for all future mods.