This Spectre elbow coupler has a 90 degree bend and connects any 3 inch outside diameter component or air intake tube with another 3 inch or 2-1/2 inch outside diameter component or intake tube. The coupler is made from highly durable black PVC and comes with two stainless steel worm gear hose clamps and a 2-1/2 inch removable reducer to adapt one end to a 2-1/2 inch tube. This coupler is a great option where space is limited and an immediate bend will allow the use of an intake system. Not suitable to be installed on pressurized components such as turbocharger or supercharger outlets.