Fabricate a custom intercooler tubing set up on your 2006-2007 Chevy/GMC 6.6L LLY/LBZ Duramax with the vast selection of Silicone Couplers & Boots available. Constructed with durable rubber or silicone, these couplers are also reinforced for greater reliability. Find the coupler or boot you need with a variety of sizes from 2" up to 6" in diameter. You'll find straight, reducing, hump, and angled boots ranging from 45 to 90-degree bend to choose from. PPE, Vibrant, Mishimoto, and Full Send are just a few of the top brands available from XDP.