I have a nice set on my car now that were manufactured in 2009. They have around 2k miles on them. They will be removed and stored very soon for future NCRS events only.
Just bought a new set of nitto's and very anxious to see how much differentlt the car rides.
IMHO the GY tires provide a harsh ride on a Corvette. I always use to put BFG tires as they provide a softer ride. This time I couldn't find a size correct set of BFG's so I decided to try the nitto's.