Improve your charge air system with the gray silicone hump hose for charge air coolers from BESTfit. Built from durable silicone with a thicker wall than standard hump hoses, this aftermarket replacement is engineered to handle demanding conditions while supporting consistent airflow between charge air components. Key features include two humps (convolutes) for flexibility, three stainless steel reinforcement rings for added strength, and a fluorocarbon lining designed to help limit vapor permeation. Available in sizes such as 4-inch and 4.5-inch inner diameters with a 6-inch overall length, these hoses offer temperature resistance ranging from as low as -65F up to 500F depending on the model, along with maximum operating pressures reaching up to 70 PSI. Each hose is sold individually and includes warranty coverage against defects in materials and workmanship.