Homestead where in the latter of the two races mentioned, he led the most laps, he lost both races to Kurt Busch however. In 2003, Nemechek started in the second spot, led the most laps, and won the Pontiac Excitement 400. The race was rain-shortened with seven laps left, and just three minutes under a red flag, NASCAR called the race official. Nemechek, in an indoor victory lane, dedicated his win to Nadeau, who previously suffered a massive crash during a practice run at Richmond, which would end up ending Nadeau's career in motorsports. After the big win, Nemechek posted five other Top 10 finishes but finished 25th in points. It wasn't enough for Nemechek to keep his job at Hendrick, and was announced to be released from his contract at the end of the season in favor of their Busch Series driver, Brian Vickers. The team later ended up releasing Nemechek early to prepare for Vickers' start in the No. 25 in 2004. Nemechek would move to his 2004 team, the No. 01 for MB2 Motorsports, early, as well. MB2 Motorsports/Ginn Racing For the 2004 season, Nemechek returned to MB2 Motorsports, taking over the No. 01 U.S. Army-sponsored car. He was again replacing Jerry Nadeau as the driver, although this time it was due to Nadeau suffering a severe injury that would eventually end his racing career. He won two poles late in the season. In October, Nemechek won at Kansas Speedway, beating out Ricky Rudd at the finish line. Nemechek also won the Busch Series race at Kansas the day before, making him the first driver to pull the Busch-Cup double win at the track. The victory by Nemechek and MB2 at Kansas was a very emotional victory and Nemechek would say in a post-race interview that it was the biggest win of his career. In 2005, Nemechek won a pole at Michigan. The season was highlighted by a feud with Kevin Harvick. After Harvick caused a multi-car crash involving Nemechek during practice for the 2005 Daytona 500, Nemechek and Jimmie Johnson were outspoken about their displeasure with Harvick. Later, Nemechek got into a tussle with Harvick during The Nextel Challenge. Nemechek got turned into Harvick by Tony Stewart and, because of their Daytona feud, Harvick took Nemechek's role in the wreck personally, which ignited a heated post-race conversation that nearly came to blows. Nemechek remarked post-race that,