Youll find the vast selection of Silicone Couplers & Boots you need to fabricate a custom intercooler tubing set up on your 1989-1993 Dodge 5.9L Diesel. Youll find straight, reducing, hump, and angled boots ranging from 45 to 90-degree bend to choose from. From 2-inch all the way up to 6-inch diameter, youll find the coupler to fit your needs. These rubber or silicone boots offer greater longevity as they are reinforced for strength. Vibrant, PPE, Full Send, and Mishimoto are the brands available at XDP.