Place this on your Wrangler JL just behind the front resonator. For my taste, the Flowmaster Delta Force 2 Cat Back got too much hum. Definitely got the whole drone out and toned it down a bit. Also, what I like most about the sound is that it has more bass! doesn't look like a rice cooker anymore. Now very happy with the system! I think I would put one of these in any rear axle system.