Stock is actually 18x8.0 +43 front and 18x9.0 +15 (from my searching, that's what I read) rear.
Stretching the tires just a bit over a 8.5 and 9.5" wheels should be fine.
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'10 PW 370Z 7AT - wife's car - Project Raspberry Cheesecake
'08 Evo X - built motor+trans | BB-X @ 32 psi | CH3OH | self-built+tuned - ??? WHP
'01 Galant V6 - built motor | GT35R | self-built+tuned - 550+ WHP (retired) |