Duramax Engine Build by Wehrli Custom Fabrication
Duramax Engine Build Tools by Wehrli Custom Fabrication
Duramax Engine Repair by Wehrli Custom Fabrication


Sometimes you want just a little more out of your engine, which means you need custom engine builds. Wehrli is one of the industry experts and premier Duramax engine builders not only in the state, but the country! We have local customers that have their engine built in our shop and national customers that have us build them and ship them out.

Paramount to the success of any new engine build is the testing and validation of the new configuration as well as the parts on the engine. Since we use the best components available, you can rest assured no Duramax engine is installed or shipped until it passes every stringent test available.

Your engine will be perfectly tuned and customized to your exact specifications. Whether we install it here in our shop or ship it to you, you know you are getting the best when we build it.

Benefits of having your engine built by Wehrli

  • All parts are washed in our industrial parts washing machine
  • High wear components replaced as needed
  • Upgrades available and incorporated directly into your original build

If you’re collecting parts for your own engine build, Wehrli Custom Fabrication is a licensed dealer for and recommends the following products:

  • Carrillo
  • Mahle
  • Firgers
  • Pistons
  • ATI Balancers
  • Socal Diesel Engine Components
  • Wagler Engine Components

The pricing of the build will depend upon requested modifications and specs. Please contact us to discuss your trucks new engine.

Email: Jordan@WCFab.com
Phone: 630-277-8239
Shop: 417 Borden Ave, Sycamore, IL, 60178

Take a look at our complete selection of diesel products!

Become a Certified Dealer for Wehrli Custom Fabrication today!