just got it installed in my '09 cabrio... what a difference ! definite improvement on sound and power (ok, I love the car so I could be biased

). too early to say if improved mileage is noticeable, but I don't care - the sound is worth alone !
btw - it is a pain in the b..tt to remove the original intake system, that bottom screw is extremely hard to get to. Thanks Boeshbuilt for job well done.