My hood lifted and caught the latch at 120. Haven't been over 100 since. May ditch my hood lifts
There are some rough highways where I am and mine only did it when there was cross wind and rough parts of the highway.I did have some scary hood flutter last year at the track. I was on unbalanced slicks slowing down from 130.something and there was a bit of crosswind. Never did it with balanced tires. I know you said they were balanced but I have to wonder how well.
Don't count on that fixing anything, carrier bearings always have movement.
Did you ever figure out what this was man?? Im having the same issue..
When my 13' done this the lower air dam had tore loose from the radiator support... By the speedo I was running about 160 when it ripped loose and I thought the damn hood was gonna fly off. Took me awhile to figure out what it was. Fixed it but it tore loose again at about 130, traded it a couple weeks later. I do have an aftermarket radiator support though. When I put the RS on my 14' I added a bracket on each end to better secure the air dam and have yet to have any issues.