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. Based in Avon Lake, Ohio, the company has expanded under the leadership of the Markley family into new product lines including Boom Mat™, Ny-Trex™, Radiator Relief™ DEI Powersports and CryO2™. In addition to supplying the performance automotive aftermarket with thermal tuning products, DEI products are distributed and sold to 12 volt,  powersports, marine, industrial and commercial truck markets with distribution throughout North America and Europe.