Get the Intake Couplers & Elbows you need to finish the custom intake or repair your existing intake on your 2003-2010 Chevy/GMC Kodiak/TopKick 6.6L Duramax. You will find a vast selection of hump, straight, reducing, and 90-degree couplers. Manufactured out of rubber, silicone, or plastic, these couplers come in various sizes ranging from 3.5" all the way up to 6" diameter. XDP carries top manufacturers such as Fleece Performance, Vibrant, Grand Rock, and AFE.