DEI uses ESPRIT in the raceshop for all five of its NEXTEL Cup and Busch Series race teams. The Nextel teams are the #1 Bass Pro car driven by Martin Truex Jr.'; the #8 Budweiser car driven by Dale Earnhardt Jr.; #15 NAPA Auto Parts driven by Michael Waltrip. The DEI Busch Series teams are the #8 Chance 2 Motorsports Bass Pro car driven by Martin Truex Jr. and the #11 Menards car driven by Paul Menard.