All finally installed in the last week. This was the first experience with the Vortex sprocket - wasn't impressed with fit for the chain. Pull the chain at the end of the sprocket and it feels/looks like the chain is 25% worn. Oh well. It'll most likely last a couple of summers. I went up from a 42t to a 44t size sprocket. I recommend this size to anyone. The accelerating is so effortless for the bike. I credit more the the lower gearing than the exhaust. The slip-ons have a sound reducer between the mid-pipe and mufflers - gotta like that reverse cone look. Sound might be a bit louder than I would prefer - it did take two years to want to get an aftermarket exhaust because I really like the quietness. Burbling is minimal during decel even with the K&N filter. Have to ride more for a better opinion on that.