Thanks all. Well with a remap it's already a V8 M3 beater (E46 bye bye), big engine in small car.
Apparently the tints are legal, not sure why they appear so dark in the pics, maybe just because of all the black and the dark rears. Still, not sure I want front tints so might have them removed and keep the rears.
Twin turbo Sean, N54. I'm not a fan of the N55 honestly, seems like a step backwards performance wise.