Youll find the vast selection of Silicone Couplers & Boots you need to fabricate a custom intercooler tubing set up on your 2003-2004 Dodge 5.9L Diesel. Straight, hump, reducing, and angled couplers ranging in 45 to 90 degree bends are available to fit almost any need. You can find couplers ranging in size from 2" all the way up to 6" diameter. These rubber or silicone boots offer greater longevity as they are reinforced for strength. Youll find top brands such as Vibrant, PPE, Full Send, and Mishimoto brand products available at XDP.