We install the TI Cans from Diamond S and have had zero issues. They do spend a lot of time making sure they fit and flow right. We are waiting on cans for the 17 model Doo because they don't want to build them and then find out Doo made a last minute change. +/- 18 lbs. to 3 lbs. Got a shipment for the Axis last week. They have improved them a bit so it will be interesting to see if it is noticeable.
The 17 stock cans are supposedly 3lbs lighter than the 16's...putting it at 15lbs