I have a 2013 Street Glide and looking for a good power vision tune for it. Has the S&S 551 cams, Arlen Ness Big air sucker, v&h xpipe header and RC-xhaust slipons. I tried using the download ones on both S&S site and Dynojet but they all give me a timing misfire at certain rpms. Some at 2600, one at 3000 and another at 3300. I have multiple Harley mechanic friends and they all pretty much narrowed it down to the tune. Bike runs perfect outside this problem