I'm using a tune from the resources section, clavigers 2014+ roadster with CES and ramair. I tuned it last year after adding the Viking header and k and n filters. Now I removed the stock crossover and went from 2 mufflers to 1. I still think it runs great, pulls hard, smooth all the way thru rpm range, but I am getting a lot more decel pop, which I think is a condition of being too lean? Maybe there is a different tune that would work better now? I don't think there is a good dynotuner close to me. (and I have a hard time parting with money for something I can't see).