I was too cheap to buy the slims so ive got 4 of the bigger ones all over, one is in between my airbox\electric box I believe (somewhere over there as a perfect cram spot, the other side was mounted to the radiator wiring harness (I had some longer wire ties to really get it stuck there) and the fogs were punks to install, had nowhere it would really reach to so I ended up mounting them in the front of the bumper towards the outside of the honeycomb grill slightly visible from outside the car but they have a lifetime warranty so no worries on my end as they are weather sealed.