I bought the full Termi system for my 848 Streetfighter and had it installed before I took delivery of the bike. To me a Ducati just isn't right until it has a set of Termis. In terms of performance, I can't make any visceral comparisons from stock in terms of power delivery, but the aural pleasure this pipe and ECU provide was worth every penny. Fit and finish is spot on, save for the decals. If you want Termi branding, the flimsy decals are not going to last long. Ultimately this is a pure luxury purchase for most of us. if you are going to track your bike, then this seems like an obvious choice. If you are looking for performance for the dollar for your street bike, then I would give it a miss and stay with the stock exhaust or do slip ons. For sure this pipe is loud - so if you want to stay stealthy it would be a terrible purchase!