Since there has been some debate over this I have had mine on the rolling road and will quote the figures below for you. It was a warm day, 23 degrees at time of test and there was difficulty getting enough cold air to my engine, so these figures will be lower than what I could expect to see on 1) as cooler day, 2) at speed on the road.
Std BHP: 262 BHP @ 6505 RPM
Std Torque: 329 NM @ 3587 RPM
Mapped BHP: 306 BHP @ 6672 RPM
Mapped Torque: 380 NM @ 3239 RPM
Increase at peak:
BHP: 44 BHP @ 6314 RPM
Torque: 89 NM @ 3109 RPM
I was told the Std output is normaly a bit higer than this, but due to air temp not being controoled as well as they would like, it reqad lower. At least it still hit "Stock" though.
From the superchips website example, I am only down 4 BHP and 7 NM, so not a bad result.