Porsche’s next GT4 could be a 911 – report

Production of the Porsche 718 range – which included the Boxster, Cayman, and the hardcore Cayman GT4 RS – ended in October 2025, but a new report suggests the GT4 name may live on.

According to the UK’s Evo magazine, Porsche has been testing a stripped-down 911 prototype among several vehicles from the GT4 racing category.

While the GT3 and GT4 badges are synonymous with Porsche’s high-performance road models, those are also designations given to racing cars from different classes, denoting performance.

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The GT3 and GT4 race categories require all vehicles within those divisions to be built to exacting specifications to meet ‘Balance of Performance’ standards, ensuring competition comes down to driver skill, rather than budget.

With the 718 no longer being produced, Porsche may now be turning to the 911 to fill the gap for the Sprint Challenge – a one-make series in which competitors race against each other in track-only Cayman GT4 RS Clubsport vehicles, with championships based in the UK, North America, and Australia.

Per Evo, the endplates on the GT3-sourced swan-neck rear wing carry the ‘Challenge’ name in Porsche’s trademark script, adding weight to the theory of a 911 GT4 Clubsport replacing the 718 Cayman GT4 RS Clubsport in the Sprint Challenge series.

Borrowing several components from the GT3, the GT4-spec 911 would likely offer more modest performance at a lower price than the German brand's 911 GT3 Cup car, which races in the Carrera Cup series.

Vehicles racing in the GT4 class are typically required to use lower downforce, together with both power and weight restrictions.

At this stage, there’s no evidence to suggest a road version of the Porsche 911 GT4 is under consideration, however, the Cayman GT4 could make a return to showrooms eventually.

Earlier reports claim Porsche may drop plans to introduce a range of electric Boxster and Cayman models to replace the 718, with the new-generation sports cars now reportedly being developed with petrol engines.

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