So that's stock? Great, just got 60 miles on my 08 with the 10 update yesterday and it seemed to run great. The dealer said Poo "recommends" using the stock pipe or they "may not" warranty the engine should I have problems again but I left it on. WTF!? If this keeps happening how can they not regardless of pipes?? I'm starting to get a bad taste of Poo in my mouth. I absolutely LOVE this sled too. What gives. Pulling my exhaust valves today!! Update later.