Find a huge variety of Silicone Couplers & Boots you need to finish your project 2021-2022 Jeep Gladiator JT 3.0L EcoDiesel. These couplers are constructed with durable rubber or silicone and are reinforced for greater strength. 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. PPE, Vibrant, Mishimoto, and Full Send are just a few of the top brands available from XDP.