I have owned both the BDJ and Needswings intakes and although the sound of the supercharger is louder with the BDJ, I do feel I picked up HP gains with the Needswings. I have not been to the track to check 1/4 mile times due to the extreme Texas heat, but I can confirm that the car looses more traction at a 30mph roll with the Needswings than the BDJ. I would assume this is from a cooler more dense air charge translating to more HP and wheelspin~

My vote will be for the Needswing unit and Rob is a great guy to work with. The fit and finish is perfect and the unit is well designed.

Just my .02