I have the full system. You can get just the slip ons, but I did the full Ivan's performance upgrade which requires the full system.@grinja1k, did you find the bobbins.spools still impacted the muffles when you ditched the stock ones and put aftermarket mufflers on? BTW, how are you finding the mufflers, or is a full system? I couldn't find Apokrovic slip ons when I started looking, so have now got the Yoshi R-77s in mind!