I recenly just purchased a v&h competition pipe for my 2010 vrscdx. I also got the k&n filter and a pcv. Well I had heard some bad experiences with the pcv from a close friend that works at the harley dealer, so I returned it and was planning on just getting a download from harley. He got the pipes on and test rode it to see how it done. He said it hesitates a small bit when you roll on the throttle hard and would probably need a tune. He took it back and removed the top of the airbox and test rode it topless and said that it doesn't need a download anymore. It runs strong with no decel popping or backfire what so ever. Have any of you guys had an experience like this?