Hi, I have recently installed the Borla Axle Back -Attack on my 2015 Jeep SRT. Sounds amazing... Just like the Borla Video. No issues with fitment/install, zero drone, feels a bit quicker so I think there is some power gain. My friend has a 2014 Jeep SRT and installed the attack on his at the same time... His sounds a little more muted and the exhaust shop tech noted that this was due to the pressure valves in 2014 ... Which can be removed as they essentially have no real purpose.
The part shop had called Borla before I purchased the system for confirmation that it would work on the 2015 ... They confirmed that Borla Rep indicated that as long as it bolts on like 2014 there will be no issues. I think it depends on who you talk to at Borla and what reply or opinion the Individual Rep has... Keep in mind they have a new product for 2015 which is double the price (acknowledge it's cat-back) of the current axleback that they would now rather sell to 2015 owners vs. The 2014 set-up... That's Business!