Offering up to 5 000 lbs. of load-leveling capacity the LoadLifter 5000 kit from Air Lift will make towing and hauling with your Nissan Frontier 4WD a comfortable and stress-free experience. Fully adjustable from 5-100 PSI our air springs are the perfect partner for your vehicle helping to eliminate problems frequently faced when towing and hauling such as squat poor headlight aim trailer sway body roll and bottoming out. The LoadLifter 5000 is also designed to improve braking and steering while each kit has upper and lower roll plates to protect the air springs from sharp edges. The air springs are built similarly to a tire reinforced with 2-ply fabric for maximum strength. All end caps are made with an ultra-high strength nylon composite formula strong as steel but much lighter and corrosion-proof. Installing the kit is simple requiring only common hand tools and no frame drilling. The LoadLifter 5000 kit has clear easy-to-follow instructions. As the leader in air suspension products for over 70 years Air Lift is committed to delivering quality load support products that fit work and last. To ensure the highest quality longevity and customer satisfaction the key suspension components including the air springs and all hardware have all been torture-tested to 1 million cycles on our hydraulic test rig. With a limited lifetime warranty a 60-day ride satisfaction guarantee and a dedicated in-house customer service team you can purchase this kit with peace of mind.