You can always remove the resonator from the left guard, get rid of the factory pathetic induction piping and now run sum 2"....2.5" piping down from the factory air box and down to the guard and front bar!!!! You now should change to a K&N pannel filter.....You now stay leagal and still have cold air induction!!!!!! This idea was told to me by a few guys that are using a sportivo motor in a hill-climb cars they are racing drivers and mechanics/ engineers!!!!They said its not worth wasting money on the TRD or others due to the fact if anything their larger diametre piping and Pod filter gets allot of air in but becuase of the length and diametre it now lacks in the pressure that helps draw the air in...where in keeping ur factory air box and increasing the size of the induction piping and running it down to the where the factory resonator is you now have got the perfect amount of cold air, piping size and length and box pressure!!!! Dont ask me but this is wat i was told by these guys and they are getting 250....300HP out of N/A 4AGE 4cyl motors!!!!!!! I just thought i would add this idea for the people who want to stay leagal with their induction mods and do it on a POV MOD budget!!!!! You can get the piping from bunnings warehouse or any plumbing store and u just need a mate to help u re-allign ur front bar cos u have to drop it to get to the resonator!!!!! HAVE FUN DOING IT TOO!!!!!