He is the first Bulgarian driver to participate in FIA Formula 2 Championship, and the only Bulgarian driver to compete in 24 Hours of Le Mans, Le Mans series, ADAC GT Masters, International GT Open, FIA European Touring Car Cup, Italian Touring Car Championship and Ferrari Challenge.

Kralev wraps up his active racing career in 2018 in the Italian Touring Car Championship with a podium finish at Misano.

Kralev ran as high as third on the Ferrari Challenge World Cup event near the end of the season but fell back due to tire problems.

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.

Plamen Kralev remains the only Bulgarian driver to have participated in the 24 Hours of Le Mans series to date.

[3] Despite the lack of any experience in Formula racing, Kralev managed to meet the eligibility criteria and finished a full season.

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.