My Whipple has arrived (thank you Lethal Performance). Unfortunately, it wil be sitting on the floor until my car is back from the dealer. I have the vibration issue between 50 and 70 mph that is another thread in here. They have replaced the driveshaft but to no avail, and now they are checking the rear end. Can't have supercharger installed until warranty issue is resolved.
They have informed me it is the ring and pinion which should be replaced on Monday.