Airaid U-Build-It - Silicone Coupler 4in. ID x 5-11/32in. x 2-29/32in. L. (Oval)

The AIRAID Silicone Reducer Coupler connects two air intake tubes of different diameters. Use of this component with other AIRAID couplers, tubes and related U-Build-It components allows you to design your very own custom performance air intake system. The AIRAID Silicone Reducer Coupler connects two air intake tubes of different diameters.