2023 Porsche 911 GT3 RS MR is honed at the ‘Ring

Porsche’s 992-generation 911 GT3 RS is already one of the most potent factory-built track cars one can buy, but Manthey-Racing is out to improve the formula with a range of performance upgrades. A prototype for the Manthey-enhanced 911 GT3 RS has been spotted testing at the Nürburgring, where Manthey’s headquarters are located, and the first…