The Spectre Intake Coupler Elbow connects a 4 inch outside diameter component or air intake tube to another 4 inch outside diameter component or intake tube at a tight 90 degree angle. Two stainless steel worm gear hose clamps are included for installation. This coupler is not suitable to be installed on pressurized components such as turbocharger or supercharger outlets. Product Features:90 degree coupler connects 4 inch diameter intake tubesIncludes coupler and two clampsSmall bend radius makes this coupler fit in tight spacesMade from black PVC