From experience with my other rides, an Evo 7 and an STi, if you have exposed intakes which are not properly shielded from heat, you might as well go drop-in. That's why I got the TRD which I believe is made by Pipercross. I have Pipercross filters in my other cars. For my STi, Pipercorss designed an intake which draws air from the outside thru the right fender. Everything is covered/surrounded by carbon fibre and the temperature in the intake is ambient temp. Versus one with no shield/encasing, intake temp is at least double than ambient. Not ideal. Unless F, JoeZ or whoever makes a decent heat shield/ram air, I will stay with my drop-ins.