I'll never use a K&N filter again. I had one mess up sensors on my 89 Supercharged MR2 several years ago and was expensive to fix. From now on I'll always stay with dry filters. Do you have the same Injen as the one I linked?Good call. It might be easier just to unclamp the whole intake and then undo the filter separately. I always use the K&N filters, so I don't need to change it so much (I do more than they say you need to), but this is a good idea. Just unclamp the whole thing and pull it forward rather than just the filter. Then you don't need to unbutton the front bumper and you can check the throttle body and inside the intake too. Nice.
---------- Post added 03-14-2016 at 09:54 PM ----------
By the way, with my Injen SRI, my favorite filter is the K&N RX-4860. It is the best. It'll fit any 2.5" diameter intake.
Link here: K&N RX-4860 Universal X-Stream Clamp-On, Universal Air Filters
It's like the normal filter, but add the extra filtration/breather on top. Since these last forever and can be cleaned and reused, it's worth the money to me to buy it.
If you have an intake with a different flange diameter, just search K&N for that size and look for the "RX" prefix filters. Great stuff.