i got my new (Y rated) bridgestones put on yesterday. i like the way they feel better than the goodyears. i am not sure if it is the size difference (345 rears -265 fronts) or the construstion or the compound but they seem to be more compliant and predictable. i still get tire spin at the top of first gear with these tires just like i did with the goodyears but then i knew this would be the case as a street tire is no race tire. i think with the whipple these tires will be fine but if i had TT's on my GT i would be running the Hoosier R6's. just my .02 cents worth....