so thats not at all the same. Also, a 555r is not an ET Street.....nice sticky tire but yet not close to an ET Street. Anyways, my info is a direct quote from GD and I have first hand experience w/ a 275 ET Street as well, so I'm not just sayin... But if he is going with a 30GTX setup, as he says he is, then yes it would be advised to have 315 setup.......hell a make-believe 515 setup would still prob spin w/ that turbo!!!! LOL
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