Two best power mods that are relatively cheap is to allow air IN and air OUT.
Ramair or k&n air filter coupled with a good free flowing exhaust then a Dyno tune you should see an increase of about 40hp. Forget the GIPro with ATRE with a Roadster as you already have a Gear Indicator in the gauges. The Dyno tune will sort out the timing in the 1-3 gears.
You can also use one of [USER=2299]@HansO[/USER] tunes instead of a Dyno, but Dyno would achieve best results
