GET MAXIMUM AIRFLOW. MINIMIZE RISK. The diameter adjusted radius based on the Flange ID allows for minimum restriction in the airflow. PREMIUM SILICONE MATERIAL S&B Silicone is a premium silicone rubber. Silicone won't crack, has exceptional tear strength, and can handle temperatures as high as 400F. EMBOSSED STAINLESS STEEL MESH Double stepped design for added strength. Allows clearance for all turbos and superchargers. STAINLESS STEEL HOSE CLAMP Includes a premium black oxide high-quality hose clamp. CHOOSE YOUR LOOK AND FIT Multiple color options including red, lime green, blue and black. Available in 4", 5" and 6" diameters.