You definitely have to do quite a few modifications to install this CAI but once you do, you will definitely appreciate and enjoy it! The major issue is not the CAI itself but installing the included washer reservoir. Once you uninstall the original, you have to cut a 4"x5" hole in your splash guard (for the CAI) and you have to break the weld on your battery bracket for the CAI to fit through. Not too bad but tedious and annoying. The washer reservoir is where there were a lot of issues. I don't know about everyone else, but on mine, Injen did not get the measurements right (I have a 2002 Type S). I had to dreamed the holes where the bolts go because none of the three holes in the washer reservoir lined up properly with my car's. It added a lot of extra work. A one hour tops job ended up turning into a 4.5 hour job. However, I still give this 4 stars as now that the work is done, I really appreciate and like the CAI a lot. I honestly don't notice a difference in sound like others have, but I do notice a difference in performance (torque-wise) but I think due to a combination of the new CAI and a new cat-back Skunk2 exhaust. Overall great CAI. Definitely purchase a prefilter sleeve to go with this though!

Got the thing in like 2 days lol awesome. Though after looking at my engine then looking at the box I figured I get it professionally installed. Took them a couple hours, but its in and runs like a champ. Sticker is pretty cool too