I saw that RPW recommends this download from Victory when running their Big Slash pipe, so I took the advice and had it installed this afternoon. I will say that it works wonderfully for me ! Nary a backfire, or pop in 65 miles today. Bike runs smoother, and has a little more oomph. So, if you're uncertain as I was as to what you want to do with your set up. Give this download a try. Also.... I'm running with the o2 sensors unplugged.