In 1993 Porsche introduced the Type 993, which would be the last air-cooled 911 produced by the German company. Developed to take part in national championship series in Europe, Japan, and the United States, the stripped down race cars were officially named the 911 Cup 3.8 RSR. Customers could choose between three distinct factory-built 3.8-liter engines, each one tuned to a different specification.

Offered here is a very rare Guards Red 911 Cup 3.8 RSR, equipped with the original numbers-matching M64/75 engine. Designed for endurance racing with a power output of 349 bhp, this highly tuned engine features a resonance intake system, six intake plenums with separate throttle valves, a different camshaft profile, and no catalytic converters. Like most RSRs, the Porsche is also equipped with the type M50/34 close-ratio six-speed manual transaxle.

This outstanding RSR was originally delivered to Michael Doolin of Sandy, Utah, in July 1997. Of the 45 examples built to 3.8 RSR specification, most were raced extensively. However, chassis 398063 was never raced professionally, instead competing in Porsche Club races and National Auto Sport Association races. With just 8,000 miles from new and never subject to an accident, the RSR retains its original engine and six-speed transmission. Interestingly, the original hood, doors, and rear wing had been removed prior to competition to preserve their integrity.

After being purchased by the current owner in mid-2016, the vehicle was sent immediately to Kelly-Moss Road and Race for a thorough engine-out inspection. Kelly-Moss replaced the original front Turnwald spoiler, rear wing, rear decklid, front decklid, and both doors—which had been removed at the time of delivery—were reinstalled. The front and rear fenders and bumpers were repainted to remove previously painted-on graphics. The spartan, race-ready interior remains all-original. Most RSRs were delivered in Snow White; the original Guards Red appeared on just a handful of cars, making this rare vehicle even rarer.

Offered with the car is extensive correspondence between the original owner and the factory, technical manuals, records, and data setup. Additionally, all records from the reconditioning by Kelly-Moss accompany the vehicle.