I had a heat shieleded K&N conical. I was still getting too much intake heat. I went back to the stock box, with a K&N flat panel. I blocked the front inlet. pulling all intake air from the fender area.
I Bored a 4" hole in box on the fender side. Then sawed a hole in the inner fender. Used 2'' thick foam rubber block, the size of the lower stock box. Cut a 4" hole in the foam. Used that for a seal between the box and fender. That trick droped my summer intake temps 30 degree's @ idle. Temps are almost ambient @ constant driving, 35 mph and up.
You have to block the front stock inlet. I first used foam rubber to seal the front inlet. The fan pushes the hot air into it that area. It was still getting hot air. Stock box and fender inlet is perfect.
I also cut pieces of the insulated foil wraped windshield cover. Wraped the box and inlet tube. Got that @ a dollar store.
I should have made a project for this. I didnt 'cause I didnt know if it would work. My scan gauge, was the proof. If I ever take it apart I will take the pics. Then turn in a project.
As jerry said, get a tunner. Mine is tuned by Torrie.