Find a huge variety of Silicone Couplers & Boots you need to finish your project 1994-1997 Ford 7.3L Powerstroke. These couplers are constructed with durable rubber or silicone and are reinforced for greater strength. From 2-inch all the way up to 6-inch diameter, you"ll find the coupler to fit your needs. To meet practically any need, a variety of couplers with straight, hump, reducing, and angled bends from 45 to 90 degrees are available. PPE, Vibrant, Mishimoto, and Full Send are just a few of the top brands available from XDP.