You�ll find the vast selection of Silicone Couplers & Boots you need to fabricate a custom intercooler tubing set up on your 2017-2022 Ford 6.7L Powerstroke. Constructed with durable rubber or silicone, these couplers are also reinforced for greater reliability. You can find couplers ranging in size from 2� all the way up to 6� diameter. Straight, hump, reducing, and angled couplers ranging in 45 to 90 degree bends are available to fit almost any need. Vibrant, PPE, Full Send, and Mishimoto are the brands available at XDP.