I second the "thin" comment on the back of the supercharger. I had a hole that was almost striped when I installed mine. Basically it is very thin and alpine supplies bolts that are too short. I went to the hardware store and got some new cap screws that engaged all threads and all is fine.


Just be very careful or tell the installer to be very careful and get new bolts and test fit the piece and look in throttle body hole to see how the bolts engage the threads.