I installed mine yesterday and no, you don't need to remove the bumper or anything like that...
Basically you completely remove the stock air box, undo the bottom engine cover and the front wheel well splash guards. You have to remove some air deflector that is inside the fender and then just install the MS CAI...
Oh, and they have you relocate the fuel pump resistor (2 bolts; easy)...
My only frustrating step in this whole install was positioning everything so its in-line with the connections and not rubbing on anything. Not really frustrating, but time consuming...
After all was buttoned up, I took her out for a test drive...
All I have to say is WOW!!!! I've never had an intake drastically improve a car like this!!! My MS3 is a wild out of control beast now... Man, I thought she was powerful in stock trim...but after the intake... DAMN!!!
No traction in first and half of second during WOT...and I'm not trying to spin tires on purpose... I also leave all the controls on (DSC)...
This is really a worth while upgrade!!! Everyone should buy the MS CAI...YOU WILL NOT BE DISAPPOINTED!!!!!
Next upgrade is the dog bone... If all this power could be instantly transfered to the wheels instead of flexing the engine...it would just be a crazy ass ride!! LOL
Thanks guys for all your input!!!
I'm one very happy customer!!!