And again Gandolph is right, the speed limiter is set right at the 98-100 mark. The HPP3 will allow you to get the 128mph out of it, but that is it.
I had a talk over the last few years with the guys i do business with tires, as i had a 96 impala SS and he told me the speed rating was for sustained speeds. Like a tire rated for 110 was rated at that speed for a sustained distance. He also mentioned if i was just checking top end, hitting it and coming back down i was alright with the michelin cross terrains, but not to be cruising for 15-20 minutes at the high speeds. Just my knowledge of that subject, from what i have been told.
zeeya