You'll find the vast selection of Silicone Couplers & Boots you need to fabricate a custom intercooler tubing set up on your 2020-2023 Chevy/GMC 6.6L L5P Duramax. These boots come in a range of sizes from 2" to 6" in diameter to fit almost any application. To meet practically any need, a variety of couplers with straight, hump, reducing, and angled bends from 45 to 90 degrees are available. For increased strength, these silicone or rubber boots are reinforced to deliver a long service life. With high-quality brands like PPE, Vibrant, Mishimoto, and Full Send, you'll find what you need at XDP.