Finish the custom intake on your 2016-2019 Nissan Titan XD 5.0L Diesel with wide array of Silicone Couplers & Boots available. To meet practically any need, a variety of couplers with straight, hump, reducing, and angled bends from 45 to 90 degrees are available. These boots come in a range of sizes from 2" to 6" in diameter to fit almost any application. These reinforced couplers are manufactured with durable rubber or silicone for increased reliability. XDP has all the best brands such as PPE, Vibrant, Mishimoto, and Full Send.