This Spectre Intake Coupler connects two 3 inch outside diameter components or air intake tubes together. This intake coupler is 2-1/4 inches in length and made from blue PVC and comes complete with 2 stainless steel worm gear hose clamps. Not suitable to be installed on pressurized components such as turbocharger or supercharger outlets. This Spectre Intake Coupler connects a 3 inch outside diameter component or air intake tube with a 2-1/2 inch outside diameter component. Made from blue PVC and comes with two stainless steel worm gear hose clamps.