Porsche Unveils the 911 GT4 R to Replace Cayman GT4 in GT4 Racing
Porsche introduced the 911 GT4 R, a GT4 race car based on the 911 Cup that will replace the Cayman GT4 RS Clubsport in GT4 competition; it uses a 4.0-liter flat-6 around 520 hp, revs to 8,750 rpm, weighs about 3,340 lb, and employs a six‑speed sequential with a dog-type clutch and a mechanical limited-slip diff, with wider tracks and 11-position rear wing; it rides on five-bolt wheels to meet GT4 rules and costs $375,500 including delivery, targeting IMSA Michelin Pilot Challenge and SRO Pirelli GT4 America in 2027.