Riley Motorsports has announced a new full-season programme for the upcoming 2026 GT World Challenge America powered by AWS season, with Slade Stewart making his series debut, and Andy Lee making his return, in the #14 BMW M4 GT3 EVO.
The duo had raced together at Flying Lizard Motorsports for three seasons in Lamborghini Super Trofeo North America.
Most importantly, the step-up for Stewart and Lee will see the beloved bright pink “Sparklefarts the Unicorn” livery grace the GT World America stage for the very first time. Originally designed by Stewart’s children, it’s become a fan-favourite in Lamborghini one-make racing since Stewart first ran the design in 2022.
Entrepeneur and racing driver Stewart won the 2022 LB Cup title and will make his first full-time foray into GT3 racing. “As I continue to grow in motorsports as in life, it is important to me to always seek out the best there is, no matter the circumstances,” said Stewart.
“Andy and I are excited to announce that we have partnered with Riley Motorsports as we shift gears into the 2026 SRO GT World Challenge America season. Riley Motorsports has a deep and rich history in motorsports spanning over 60 years. We couldn’t be happier with the start of the new relationship, so make sure to tune in and follow out journey together this season.”
Lee previously drive the BMW M4 GT3 EVO for Flying Lizard Motorsports from the summer of 2024 to the spring of 2025, and has years of experience racing in the SRO America ladder system.
“After several successful seasons in Lamborghini Super Trofeo, Slade and I were looking for a new series to continue our progression,” Lee said.
“SRO GT World Challenge America felt like the natural place to go to keep growing as teammates and drivers. The opportunity to do it with such an illustrious team as Riley Motorsports is just a dream. We can’t wait to continue with the team and work towards the opening round at Sonoma Raceway!”
Riley, Stewart, and Lee recently completed its first test with the newest iteration of Sparklefarts at Sebring International Raceway, ahead of the opening round of the 2026 season at Sonoma on 27–29 March.
Further announcements of SRO America programmes for Riley Motorsports and Kellymoss will be made at a later date.
Feature image © Josh Lambeth / Riley Motorsports
