InfinitiPartsDeal.com offers the wholesale prices for genuine 2012 Infiniti FX50 parts. Parts like Governor,Power Train & Planetary Gear 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.