1. Even with the stock y-pipe and exhaust it definitely revs up quicker/smoother. Also you can also hear/feel the VVT-i kick in more now.

2. Torque feels just fine. This was one of my biggest concerns before putting them on. Having an auto probably negates a lot of the loss you would expect by looking at the dyno chart since the engine's torque convertor allows for a bit of stall.

3. Mileage seems to be up 1-2mpg. Haven't really got down to figure it out yet and get some solid numbers. The digital readout shows longer DTE (I know this isn't accurate, more of an indicator).

4. Rest of the exhaust will be done out with a Y-pipe of some sort (prob Thorley again) followed most likely with a TRD exhaust.