In 2012, the K-PAX Racing team returned in both the World Challenge and U.S. Touring Car Championship with newcomer Robert Thorne. Thorne, then 19 years old, competed without a teammate in the Touring Car class. In his first time out, Thorne won the 2012 USTCC series title with three pole positions, one win and six podium finishes. Thorne also competed in one World Challenge Series race at Sonoma Raceway, where he took the checkered flag. At the same time, veteran Alex Figge joined Pobst in the GT Class, with the drivers taking fifth and third, respectively, in the 2012 Pirelli World Challenge series. The followed up in 2013 with Pobst taking fourth in the drivers' standings and Figge taking fifth. For the 2015 season, K-PAX began a partnership with Flying Lizard Motorsports. The team continued its relationship with McLaren GT by competing with two McLaren 650S GT3s. Figge was replaced by McLaren GT factory driver Kevin Estre. Estre would take four wins at Austin, Barber, Detroit, and Sonoma, finishing fifth in points. He would later be picked up by Porsche as a factory driver. For 2016, Estre and Thorne were replaced by McLaren factory driver Álvaro Parente, as well as young drivers Austin Cindric and Colin Thompson. Parente would take six wins and K-PAX's first championship since 2010. Cindric would take three podiums while Thompson struggled to adjust to the McLaren. To complete the season, K-Pax embarked on its first ever endurance event. For 2017, FLM and K-PAX dissolved their partnership. Cindric transitioned to the NASCAR Camping World Truck Series, and Thompson was released. Replacing Cindric and Thompson was professional driver Bryan Sellers and gentleman driver Mike Hedlund. In addition, K-PAX announced its participation in the Sprint-X championship, with McLaren factory drivers Ben Barnicoat partnering with Parente and veteran Jonny Kane teaming with Sellers in the Pro-Pro category. Hedlund would be teamed with inaugural SprintX champion Michael Lewis in the Pro-Am category. Through the first half of the season, the team fielded three cars before downsizing to its two GT cars. Collectively the team won four races in 2017, finishing runner-up in the Sprint GT Championship. In late 2010, Haughey partnered with entrepreneur Peter J Nielsen to establish K-PAX Performance Cars.