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Dale Markley, well known and long-time performance industry veteran, founded DEI in 1995 with his wife Nancy. They formed the company with a vision of developing dynamic solutions for the racing and performance industry’s ongoing struggle with under hood power-robbing heat issues.

The business was started in a small space, located in Cleveland, Ohio, behind a convenience store. Within a few years DEI had to double the space. Dale and Nancy worked together to bring DEI and its Thermal Tuning Products to a whole new level before Dale’s passing in 2001.
Dale’s son David now continues his vision of moving DEI forward by developing and improving products to ensure they remain industry leaders. In late 2004, DEI relocated to a new facility, affording ample room for expansion and manufacturing. Today, DEI is bigger, stronger and “cooler” than ever.

DEI

DEI

DEI

Dale Markley, well known and long-time performance industry veteran, founded DEI in 1995 with his wife Nancy. They formed the company with a vision of developing dynamic solutions for the racing and performance industry’s ongoing struggle with under hood power-robbing heat issues.

The business was started in a small space, located in Cleveland, Ohio, behind a convenience store. Within a few years DEI had to double the space. Dale and Nancy worked together to bring DEI and its Thermal Tuning Products to a whole new level before Dale’s passing in 2001.
Dale’s son David now continues his vision of moving DEI forward by developing and improving products to ensure they remain industry leaders. In late 2004, DEI relocated to a new facility, affording ample room for expansion and manufacturing. Today, DEI is bigger, stronger and “cooler” than ever.

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