Good advice about the noise, don't want that. If an increase in power or fuel economy (which they all claim) is not noticeable then whatÆs the point. I love my Rubicon but the quality is disappointing. Less than 2 years old, already had the fuel pump die, now the front end is going out. As I was underneath it looking to see if I could see what's wearing out causing the "Death Wobble" I noticed water dripping from the front of the muffler. I was wondering if it would even be covered and was considering a Stainless Steel replacement. I guess Jeep can do it for me every 15K miles until itÆs out of warranty. If thatÆs good for 75K miles I guess thatÆs approx. 5 mufflers.