This is the official channel for Wehrli Custom Fabrication, a company specializing in high-performance diesel upgrades and metal fabrication. At WCFab we take great pride in our reputation for providing the highest quality, Made in the USA fabricated parts and upgrades for your Duramax, Powerstroke, & Cummins Diesel trucks. Whether you're looking to outfit your tow rig with our popular S400 over stock compound turbo kit, or if you're looking for four-digit horsepower numbers, we can handle it. Subscribe to our channel (and our newsletter on our website) for a look behind scenes at our shop, keep up with our R&D and shop truck builds, and receive all the latest updates on new product releases.