Find a huge variety of Silicone Couplers & Boots you need to finish your project 2004.5-2007 Dodge 5.9L Diesel. You'll find straight, reducing, hump, and angled boots ranging from 45 to 90-degree bend to choose from. These reinforced couplers are manufactured with durable rubber or silicone for increased reliability. From 2" all the way up to 6" in diameter, you'll find the coupler to fit your needs. XDP has all the best brands such as PPE, Vibrant, Mishimoto, and Full Send.