[C. Ludwig]

Can do. The S5 does run rich under wide open throttle but the off throttle tune is near ideal. I wouldn't expect much increase in fuel mileage.

MAF is not removeable. It is still used. In my experience the VDI doesn't play much of a role in power one way or the other. A couple HP below 5000 RPM is all it's worth. If you have all the stock equipment in place to run it leave it there. The Rtek will control it just fine. If you've removed everything I would just lock it in the high RPM position.

Leave the 6-port sleeves out IMO. They hurt the top end power more than they help low end. You'll see 2-4 hp by removing the rods and sleeves on the top end. The rod and the piece in the sleeve that the rod engages to turn is the biggest part of the restriction/turbulence.