Ok i finaly instaled my dual NW intake, i previously had the SL55 intake and the first thing i noticed that was different was the addictive note of the supercharger whine. If not going full throttle the sound comes at different times depending how i pushed the throttle. Pushing the throttle in a certain way where the car is gradualy accelerating not too spiritidly the whine is alot louder and profound than other techniques. I noticed under full throttle the whine is always there. I noticed under full throttle its always amazing In terms of power it felt very much the same as my SL and that was no surprise to me. This evening I took it for some proper testing.. I managed to grab my mate with the 135i who i have tested my car with every step of the way from stock form to now. After a few digs i realised i had to change my technique as i am now getting increased amounts of wheel spin. Im still getting used to that. So that led me to timing my car to see If my times were any different to before. Usually i average 4.5 to 60 with my last setup and with this intake i was averaging low 4.4s and dipping into the 4.3s. The feel from the dig race and its only perception was that i was now pulling harder from 2nd. In contrast to past experiances i felt i was pulling in faster now. Does the ECU need time to adjust to the intake meaning in a couple days perhaps it will be quicker? Overal im really happy with the intake it looks great in the engine bay and sounds fantastic