Reply To: Vitpilen 701 Leo Vince De-cat & Dynotune January 12, 2019 at 9:15 pm #3164 Rob of SwedenParticipant Leo has dynocharts for all combinations. Stock muffler and decat is the best and very similar to stock. Maybe little more tourqe at 5000rpm. Worst is Leo slipon with decat. I think you have to remap the failing.