2003 Plamen Kralev debuted his racing career in 2003 in the Bulgarian Road Championship and became champion of class X3 in the same year. Simultaneously he also won the National Off-Road Championship in Bulgaria. 2007 Kralev began his international career in 2007 in the European Ferrari Challenge series, driving for Team Rosokorso. In his first season Kralev recorded two wins: Hockenheimring and Mugello. At the end of the season he was ranked 11th place with 112 points. 2008 In 2008, Kralev moved to Kessel Racing. He participated both in the Ferrari Challenge as well as in the FIA GT3European Championship. Kralev was initially partnered with Dimitar Iliev and was later teamed with Niki Cadei. Kralev and Kessel Racing also participated in the German ADAC GT Masters series with their GT3 car. During 2008 Kralev recorded two wins in the Ferrari Challenge and was ranked fifth at the end of the season. Kralev ran as high as third on the Ferrari Challenge World Cup event near the end of the season but fell back due of tire problems. Kralev also participated in the final round of the International GT Open in Barcelona with Matteo Cressoni. The two earned tenth and fourth-place finishes in the two races. The success he achieved during these two years led him to pursue a professional racing career. On 8 September 2008 Kralev signed a cooperation agreement with the Bulgaria State Tourism Agency to serve as the country's ambassador to the world of motorsport. Kralev's GT3 Ferrari bears the Bulgarian rose as a tourism promotion. 2009 In 2009 Kralev became the first Bulgarian to participate in the 24 Hours of Le Mansendurance race driving the Endurance Asia Team Porsche, but due to a gear box failure, had to stop at the 18th hour with 186 laps completed. Plamen Kralev remains the only Bulgarian driver to have participated in the 24 Hours of Le Mans series to date. Later that year, he joined the GP2 Asia Series in the 2009–10 season with the Trident Racing team. Despite the lack of any experience in Formula racing, Kralev managed to meet the eligibility criteria and finished a full season. 2010-12 Next, Kralev moved to the FIA Formula Two Championship for the 2010 season, and continued in the series in 2011 and 2012. He remains the first Bulgarian driver to have ever competed in the Formula Two Championship. At the end of the 2012 season, the Formula Two Championship had been disbanded and Kralev ended this stage of his racing career with it. 2014 Kralev partially competed in the European Touring Car Cup for Engstler Motorsport with BMW 320si, for 3 events and was ranked 10th place with 14 points. 2017 Plamen Kralev started racing in the FIA European Touring Car Cup and the TCR Italy Touring Car Championship for this 2017 seasons for Kraf Racing with AUDI RS3 LMS. Kraf Racing is a new bulgarian team, and despite the lack of experience still manage to get 6 podiums - 2 in ETCC and 4 in TCR. 2018 Kralev continues racing only in the TCR Italy Touring Car Championship for the 2018 season because the FIA European Touring Car Cup had folded at the end of the 2017 season. Kralev missed the second racing weekend of this season because his car was damaged from the first race in Imola and wasn't ready in time. He returned for the third racing weekend at Misano where there were a record number of 31 cars racing and yet Kralev still managed to get in 3rd place on the first race but due to a collision he became 9th in the second race.
