This rear air flow kit will deliver high air flow to the middle and rear vents of your Nissan NV passenger van. This kit will increase air flow by 85% or more. It replaces the original restricted Nissan fabric air duct system. This is an enclosed system that utilizes new high flow plastic air ducts. This system comes complete with plastic overhead ducts and installation hardware and instructions. This kit is easy to install. Most of the work is removing your headliner and the fabric duct. If you think that you cant do it yourself. You can have a local mechanic, headliner/upholstery shop or a Nissan dealer install it for you. This kit comes with comprehensive written instructions and an online youtube installation video.