The final chapter in a racing lineage dating from the hallowed Carrera RS 2.7, the Porsche 911 Cup 3.8 RSR represents the last air-cooled, naturally aspirated 911 racecar produced by Porsche’s Weissach motorsports department.

Based on the firm’s new 993 Carrera 2 platform, the RSR drew heavily from its twin-turbocharged GT2 sibling and was developed specifically for endurance competitions such as Le Mans and Daytona.

Upgrades included a six-speed manual transaxle, full Matter roll cage welded within the body, riveted GRP fender flares, front and rear Turnwald “Clubsport” spoilers, Lexan windows, an aluminum hood, and two-way adjustable Billstein suspension.

Discerning buyers could choose from a slew of 3.8-liter engine options, each tuned for specific competition and rated around 350 horsepower.

Fewer than 50 are believed to have been built before Zuffenhausen debuted the water-cooled 996 and closed the door on its storied air-cooled performance career.

Sporting an outstanding deg...