GL1800 Rear Suspension Preload LineThis is a rear suspension preload line. This stainless steel preload line is made by H E L USA and is designed to replace the factory rubber preload line on the rear suspension. Over time the stock rubber hose swells and stretches which allows air into the system. This results in having much less preload and therefore, the suspension system does not work as it was designed to. This stainless steel line eliminates any swelling and restores the