afe Magnum FORCE Intake Coupling Kit (3-1/8IN ID to 2-3/4IN ID x 90 Deg) Elbow Coupler w/ Port Black3 1 8 IN to 2 3 4 IN Reducer: This coupling features a 90 Degree angle and is designed to connect to tubes with a 3 1 8 and 2 3 4 IN diameter. It's commonly used on aFe POWER cold air intake systems, but can be used for a variety of projects. Silicone Construction: Its silicone construction features two layers of polyester reinforcement, making it extremely durable and less prone to deformation, tearing, and other damage, than average couplings. The