Not too hard to install. Maybe 45mins for someone who reads the instructions like 10 times (me). Required a trim of the rear hugger.
Also note, this exhaust will have to come off in order to remove the right side plastics; the can is directly in the way of the 3 screws on the rear of the bike that you need to remove in order to get the right side off. The left side can still come off easily.
I installed this and the PCV - i wouldn't say I notice any difference really other than the cool looks and the cool (loud!) sound. But hey that's as expected.
Two thing about the exhaust that seem odd:
The plate that's required for mounting to an SF grom goes right over the existing Yoshimura fender eliminator plate. Seems like it could have replaced it, rather than just adding another thick piece of metal on top of it.
The exhaust specs two springs connecting the header bracket (not sure what it's actually called) and the header pipe, but they seem to be at a very weird angle, the springs really seem like they are not in the right place, but there's no other way for them to go.
Otherwise, fit and finish seem really nice. I had kind of thought that the 5 sound baffles might come with it, but they didn't.
That’s too bad that the 5 sound baffles did not come with the exhaust. I was most intrigued by the notion of being to adjust the exhaust volume as needed. So.....you are running no sound-reducing baffles at this time — is that correct?