a) OK, I found the answer to this one (is this a very similar engine to the E46 M3, or based on the 335i?) Based on the 335i
b) is the exhaust note metallic like an E46 M3, or smooth/burbly like a 330i - or inbetween or what? It's not a raspy note like the E46 CSL more a deeper note
c) what mpg? I know, not important, but interested.....
I'm getting 25mpg at present
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