GTA 5 Pontiac Firebird car mods 0 Pontiac Firebird Tulip Tree 0 Pontiac Firebird 400 (2337) 1968〡add-on 0 Pontiac Firebird 1970 0 Pontiac Firebird 1970〡add-on 0 Pontiac Firebird 400 (2337) 1968〡add-on 0 Pontiac Firebird 2 Pontiac Firebird Trans Am 1977 v3.0 [replace]