Lol! Yeah! I haven't been around for a while! I still have the Commander. I'm about to to replace the front axle bushing. But to answer your question. I haven't noticed any real gas mileage benefits and they did seem to quiet the engine down. I also remember it feeling a little more peppy! But that could have just been that it needed plugs!. Good luck.
2006 Jeep Commander, 5.7 Hemi, OME 2" HD Lift,Robby spacers,New and improved Jeepin by AL UCA,265/70/17 Fierce Attitude on XD Spy 17x8 with +18 offset,Magnaflow Cat Back,4xGaurd Matrix w/hoop,Mopar Chrome side steps, Chrome door handles,Chrome Fuel door,Chrome Jeep bug deflector,AVS window vents,Home made roof lightbar, 2009 Mygig with lockpick,Backup camera.