Penrite Racing Retires Allen’s Championship-Winning Chassis, Debuts New Car at Darwin

Penrite Racing has retired the GR-03 chassis that carried Kai Allen to his first Repco Supercars Championship victory, replacing it with a brand-new GR-04 car for the upcoming betr Darwin Triple Crown round.

Historic Chassis Heads Into Retirement

The decision marks the end of an era for the 20-year-old driver’s breakthrough machine. GR-03 delivered nine podiums since Allen’s debut at Sydney last year, including his career-defining win in Christchurch and an unlikely Grand Final appearance during his rookie campaign.

Jack Bell, Penrite Racing’s Head of Race Engineering, confirmed the transition in a team announcement. The GR-03 chassis will be permanently retired rather than repurposed for future competition.

New Chassis Represents Team’s Fourth Build

The replacement car, designated GR-04, represents Penrite Racing’s fourth chassis construction project. Bell outlined the build process, which begins with the centre section before adding front and rear clips.

“We’re in the process now of building a new chassis, so it’s a big thing for us at Grove. This is our fourth car, we’re calling it GR-04.”

The new chassis marks a significant milestone for Allen, who will drive completely new equipment for the first time in his career.

Darwin Debut Carries Special Significance

Darwin holds particular significance for Allen—the Northern Territory circuit delivered his first career podiums during the previous season.

Now, as a second-year driver, Allen returns to the same venue with untested equipment. The decision to debut new machinery at a track where he’s previously succeeded suggests strategic confidence from the Grove-based team.

The betr Darwin Triple Crown round will determine whether the new chassis can match the success of its retired predecessor.

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