You ought to talk with Phil Bleazey. E-mail him. He is a great, patient, extremely knowledgeable guy. Not knowing the model of your car and mileage on it, it is difficult to say exactly what is going on. I put the bevel box mounting kit in my 2018 after I reached 300 miles on the odometer. My car was not making any noise but after the install, the car performed better at starting off and it lowered the noise in the bevel box. The extreme tension that people are putting on these belts is scary. I have ridden belt driven bikes for 20 years and I have never tightened the belt as tight as they are saying to tighten it. My next fall project is the Centa drive unit that Phil has designed. The way you can see if the NVH kit is causing the noise is to remove the seats and inboard metal sheets and pry on the bottom of the NVH kit on the bevel box end. There is a video somewhere on this sight that has a guy showing the movement. If your car is brand new there may be other issues.
Here is the video
http://www.youtube.com/watch?v=Q36-b0pG2mA
