This year, Design Engineering, Inc.™ is proud to celebrate 30 years of delivering premium-quality heat and sound control products! Since our founding, we have become the go-to brand in the automotive performance channel, recognized for innovative solutions that consistently deliver exceptional results. From professional race teams to weekend enthusiasts, our products have set the standard for performance, reliability, and quality.
Building on our unmatched expertise in the performance automotive market, we’ve expanded into developing premium heat and sound control solutions for a wide range of industries. What we’ve learned from three decades of success in this demanding market has allowed us to create cutting-edge products for powersports, recreational vehicles, farm and fleet equipment, marine applications, military and defense, industrial systems, and even residential use.
At Design Engineering, our commitment to innovation goes beyond just developing products—we are problem solvers. By applying the same rigorous standards and engineering excellence that have made us a leader in the automotive space, we’ve successfully designed solutions for countless real-world challenges. Whether it’s reducing cabin noise in a powersports vehicle, protecting critical components on a marine engine, or providing insulation for industrial systems, our products consistently deliver superior performance.
Our Beginnings
The late Dale Markley, well known and long time performance industry veteran, founded DEI in 1995. Dale and his wife Nancy formed the company with a vision of developing dynamic solutions for the racing and performance industry's ongoing struggle with underhood, power-robbing heat issues. The business was started in a small space, located in Cleveland, Ohio, behind a convenience store, and within a few years had to double the space. Before Dale's passing in 2001, he and Nancy worked together and brought DEI and its "Thermal Tuning Products" to a whole new level.
Fueled by success and further growth, it was necessary to expand operations, and in late 2004, DEI relocated from its leased location to its newly acquired complex that houses office, warehouse and manufacturing operations. The new facility afforded DEI ample room for future expansion and, in fact, manufacturing and warehouse expansion plans were quickly underway.
Today, DEI is bigger, stronger, and "cooler" than ever. With Dale's son David at the helm, the family is committed to continuing Dale's vision of moving DEI forward by developing and improving products to ensure they remain industry leaders.
We are Design Engineering
We also take pride in the wide range of customers who trust us to enhance their products and projects. From individual enthusiasts and small businesses to major manufacturers and military contractors, they all recognize our ability to deliver premium solutions that work.
As we celebrate 30 incredible years, we remain dedicated to pushing the boundaries of heat and sound control innovation. Thank you for making us your trusted partner, whether in the garage, on the track, or in the field. Here’s to 30 years of success—and many more to come!