Since I have an ARB/Safari Snorkel on my TJ, I didn't want to use the factory air box because I needed the space for other things. I already had a Turbo City air tube and I decided that I would make my own air filter box so I could still use the K&N air filter. What you see is a ABS 6" tubing cut to 10" in length and inside is the K&N air filter. With my set up, you can still use a K&N air filter and snorkel for you TJ.