Complete Car Care in Flagstaff now offers the JASPER Re-manufactured Nissan VQ40DE 4.0L DOHC Engine! Jasper Engines & Transmissions, the nation’s leader in re-manufactured products, announces the availability of its re-manufactured Nissan VQ40DE 4.0L engine. This DOHC V6 engine is available on exchange for the following 2006-2011 vehicles: Nissan Frontier, Pathfinder, X-terra offering several advantages: