I have a FGXR6T and went through this process in detail after upgrading to Brembos at the front.
I have 18" BA Typhoon rims that clear for the street.
18" x 8.5" Enkei RPF1 for the track.
Rims which also clear from other forum members:
Enkei RP03, PF01
Zumbo Yako clear AP, not Brembo with dba5000.
Volk TE37 clear.
Wolf S36
http://www.wolfwheels.co.nz/wheels/
Axis Hiro
Pretty sure 18" Speedy Cobalts and 19" Infernos do but a test fit may be required.