InfinitiPartsDeal.com offers the wholesale prices for genuine 2017 Infiniti QX70 parts. Parts like Rear Seat 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. Trim: Base, Premium, Sport.