Mishimoto Hump Hose Coupler - 2.5" Mishimoto Silicone Hump Hose Couplers can be used for a variety of applications, including building your intake and intercooler piping. Thet;hump" flexes for freedom of movement under heavy load and provides increased flexibility between two connected pipes. Available in black, blue and red, Mishimoto Silicone Hump Hose Couplers are crafted using the same high-grade silicone and heat-resistant embedded fibers we use for our our silicone radiator hoses. Tech Specs: Inlet / Outlet I/D : 2.5" Inlet / Outlet O/D : 2.8" Hump O/D : 3.3" Length : 3.0" Thickness : 4mm Purchase Includes 1 - Silicone Hump Hose Coupler Application Guide: Universal