I installed them on my 2008 FZ6 with no problems other than a bolt that got stripped. Simple fix though. I quickly purchased silencers/diffusers for the pipes-LOL
Total piece of cake. If I did it a 2nd time, I could do the whole process in an hour.
I second the motion on getting the P1 inserts on day 1. No inserts is great at highway speeds but made me feel guilty around town. Inserts are fine around town but makes me wish it were a little louder on the highway.
Side comment on the install - I think i'm going to space the main bracket up about 1/4" to get the mufflers a little more centered in the factory openings. i also retrofitted my factory fender with a little effort. I'll probably snap pics of it soon - I just have to make and install a trim piece to tie it all together.