Their customer service way exceeded my expectations. I had a problem with a product, which was mainly my fault, yet they went above and beyond to help me and make sure I was satisfied. I would highly recommend their Made in the USA product lines. Thanks again DEI.

I ordered some sound deadening and insulation materials from Design Engineering. After my project was already underway, I had found that I ordered the wrong size material. Rebecca was very genuine and did everything she could to help me make it right! Its good to know there are still places like this!

I purchased an engine compartment fan system, for my Honda Pioneer 1000-5, from DEI 2 1/2 years ago. I live in AZ and the ventilation system they sold me is perfect. The local Honda dealer accidental cut the wire to the heat sensor a couple of weeks ago. DEI had me the replacement sensor within a few days. Awesome product, amazing service.

Extraordinary in business world today. They sent me additional kit changes. Freight paid, no charge for parts. Too bad there`s not a 10 star rating.

Top quality products and fantastic people to deal with. I highly recommend their products !!!