Airaid U-Build-It - Silicone Reducer 4.0in to 3.5in x 2.5in L

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.