About

Design Engineering, Inc., founded in 1995 by the late Dale Markley, is the leading aftermarket manufacturer and global supplier of performance heat and sound control products. DEI engineered products offer the most effective means to improve an engine’s cooling efficiency to enhance performance. Boom Mat, the company’s sound deadening product line, offer products that keep a vehicle’s interior cool and quiet.

Based in Avon Lake, Ohio, the company has continued to grow employing 30 under the leadership of the Markley family and through the expansion into new product lines including: Boom Mat™, Ny-Trex™, Radiator Relief™ and CryO2™. In addition to supplying the performance automotive aftermarket with thermal tuning products, DEI serves the needs of the powersports, marine, industrial and commercial industry markets worldwide.