Kristoffersson competed for his father's team in Junior Touring Car Championship in 2008. He finished fourth in the championship, after winning two races during the season, in a Volkswagen. KMS also competed in the Swedish Touring Car Championship, which he had to move up to the year 2009. He did not take any points in the main series, but finished second behind Viktor Hallrup in the Semcon Cup, a private preparatory cup. During the 2010 season Kristoffersson drove for Team Biogas.se for three race weekends.
Touring Cars
Kristoffersson's breakthrough came in the 2011 season. It was to the races on the Falkenbergs Motorbana that he got to drive a third car for Team Biogas.se in Scandinavian Touring Car Championship. He was high up there, but had to retire both races. He then picked three fourth places in the four subsequent races, before he took a third place in the second race on the Ring Knutstorp. He then took another third place at Mantorp Park and finished the season in tenth place overall, despite the fact that he only drove just over half the season.
In 2011 Kristoffersson also drove in the Porsche Carrera Cup Scandinavia, where he fought for the title with Robin Rudholm. During the last race weekend, he had a good chance at the title, but lost it after receiving a penalty for a false start in the first race. Kristofferson won the second race, but still could not win the championship, then Rudholm finished second and had too big a lead in the overall driver's championship.
During the 2012 season, Kristoffersson competed in the Italian-based Touring Car Championship, Superstars Series, for Kristoffersson Motorsport under the name Audi Sport KMS.[1] He took five titles in a single year – winning Porsche Carrera Cup Scandinavia, STCC and Superstars Series in all three categories (Italian, International and Rookie).
In 2014 he raced part-time at the FIA World Rallycross Championship with a Kristofferson Volkswagen Polo, finishing third at Belgium. In 2015, he won at Portugal and claimed podiums at UK, Spain, Turkey and Italy, finishing third in the standings.
In 2016, KMS and Marklund merged their Volkswagen factory teams, with Kristoffersson driving a Polo. He claimed a win, three podiums and nine top six finishes, and was runner-up in the Supercars overall standings behind Mattias Ekström.
In 2019 Kristofferson would also make the switch over to rallying, running a full-time campaign with Volkswagen in the Swedish Rally Championship with his WRX team Kristoffersson Motorsport, using the Volkswagen Polo GTI R5.
He won the 2018 WRX title with a record-breaking 11 out of 12 event wins during the season.[4]