Why Upgrade your Suspension? Why upgrade the suspension on a brand new 4WD? From the factory, most new 4WD vehicles are tuned for comfort during on road driving. Once weight is added, in the form of accessories and cargo, and road conditions deteriorate, performance and reliability of your 4WD suffers. Quality, application specific, aftermarket suspension is designed to increase load carrying capability and improve both vehicle handling and comfort across all terrains, whilst providing increased ground clearance to better tackle more challenging terrain. Unlike some other accessories, you’ll notice the benefits of a new suspension system every time you drive your vehicle.