XPLOSV
Heyall, what cars in GT4 can have the option of upgrading to a supercharger?
In the North American version of the game the follwing can be supercharged:
AC Cobra, Alfa 156, Alfa 166, Buick Special, Cadillac Cien, Callaway C12, Caterham Seven, All of the Chevys (except Camaro LM, Corvette C5R, Corvette Z06 Race Car), Chrysler 300C, Citroen C3, Cizeta V16T, all of the Dodges (except SRT4, Viper Oreca), Mustang GT, Mustang SVT, FPV GT, Holden Commodore SS, Infiniti FX45, Jensen Interceptor, Lexus SC430, all of the Mazda Miatas, the three "normal" Mazda RX-8s, Mercury XR-7, 2006 Eclipse GT, Fairlady Z S-tune (Gran Turismo), 350Z, 350Z Gran Turismo 4 ltd ed, 350Z Roadster, both Nissan Cubes, Fairlady Z Version ST Option Wheel, Nissan March, Nissan Micra, Plymouth Cuda, Super Bird, Pontiac GTO, Pontiac Tempest GTO, Proto Motors Spirra, Saleen S7, Scion xA, xB, Shelby Cobra 427, Shelby Mustang GT 350R, Celica 2000GT-R (ST162), Celica GT-R (ST183, 4WS), Celica SS-II (ST202), Celica SS-II (ZZT231), Corolla Levin BZ-R, Corolla Levin 1600GT-Apex, Corolla RUNX Z Aerotourer, MR2 G-Limited, the two MR2 Spyders, Toyota RSC, Sprinter Trueno BZ-R, Sprinter Trueno GT-Apex, Tacoma X-Runner, Vitz F, Vitz RS 1.5, Vitz Euro Sport Ed, TVR Speed 12, VW New Beetle 2.0
I think this is all of them. I am finalizing a better list for this sort of thing to be posted in the near future. Oh, and be aware that cars that are already supercharged (like the 1986 Toyota MR2 1600 G-Limited Supercharger) cannot be further upgraded with additional supercharger tuning. Some of those can, however, be tuned with additional NA tuning.