I currently own a 2012 and love this beast. As it stands this is the current setup on my ride. ECU: Flashed by Tim Tire: 240 Blinkers: Delete mod plus bar end blinkers from Motogadget and love these. Exhaust: V&H w/cat delete. I really really like the sound of the SRP 4 to 1 and the 4 to 2 exhaust. I want to switch out to those and my question is will I need another reflash with a 4 to 1( I think so....) and would the 4 to 2 require it also? I am definitely noobish with this stuff and could use some assist as there is a wealth of knowledge here. I am getting ready to change my bars back to the original setup as I am not a fan of drag bars, thought I would be but I was wrong. In doing so I am changing the setup with my bar end blinkers and installing disconnects inside the bars in the I need to remove my bar end mirrors or grips. Current wiring is straight into the harness through the bars. Had I not been so excited to install these I would have thought about it before I spent the day punching myself in the face trying to fish 24 gauge wire through my bars. P.S. The bar end blinkers are legit. I noticed people were not reacting to my signals when I was turning. Once I installed the bar end blinkers everything changed and IMO this has been the best mod safety related. Thanks in advance.