'Sup. I want to modify my 3s, but I have to use it as a daily driver. My quetion is, which power mods, if any, can I do while keeping my car emission legal? Also, is it at all possible to turbocharge the 3 and keep it legal? What about cams?
I've also been looking at the Magnaflow catback exhaust. Does it cut out the secondary cat?
Will someone with experience with this throw me some advice? Thanks.

 

All depends on where you live...Up here in Michigan, we don't have emissions inspections, so you can do what you like.

 

I live in Seattle.