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.
Silicone Reducer Coupler; Adapts 4 in. To 3.875 in. Tube x 2 in. L; Incl. Two Stainless Steel Worm Drive Clamps;