I am looking for more power on my 2007 530xi. I would really like to do a supercharger kit but i don't see anything for this year being a N53 motor. Is there something out there that i am missing? Is there a turbo kit for this motor? I would really like to go with the supercharger being a cleaner/easier mod (less piping and more room). I know the disadvantage of super over turbo but think i would rather that with more room under the hood to work.