InfinitiPartsDeal.com offers the wholesale prices for genuine 2013 Infiniti FX50 parts. Parts like Body Side Panel are shipped directly from authorized Infiniti dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.5L, 6 Cyl 3.7L, 8 Cyl 5.0L. Grade/Trim: Base, Premium, Sport.