It depends on whether you want them to be open all the time or not. With just the tunes they open 100% in each gear without them now matter what is programmed they are open even when the engine is not running I am not sure what happens when the clutch s pulled in. I do wonder if they start to shut every time you pull the clutch in to shift gears. The ignition timing map does according to the gurus at tune boy. I never asked about the throttle plates and would only put them back in if I was going to use the launch control feature.