Porsche 911 Turbo Flachbau

For an additional $23,826 – the same price as a new 924 S – option code “M505” bestowed the Turbo with flat front fenders and retractable headlights. In true Porsche fashion, the M505 Slantnose option was more than just a styling exercise. Extra air vents were added above the front wheels to allow the high-pressure air to escape and reduce front-end lift at high speeds. The Turbo’s rocker panels were also widened, and cooling ducts were added in front of the rear wheels, helping cool the engine oil and rear brakes. A 911 Turbo is a desirable car, yet the M505 Slantnose option is the most significant motorsport-inspired upgrade of the Turbo era, adding another level of desirability and handbuilt exclusivity to an already highly collectible car.

Completed at Porsche in December 1988 and destined for the United States market, this factory M505-code 911 Turbo, with its Cabriolet bodywork and coveted Slantnose configuration, represents the most expensive new Porsche model available in 1989. As a final-model-year example, it is also fitted with the much-improved five-speed Getrag G50 manual transmission. This example not only sports the $29,555.00 Slantnose package, but a radio with an Alpine-Porsche CD-2 CD player, steering wheel with a raised hub, limited slip differential, shorter gearshift lever, supple leather seats, luggage compartment trimmed in Black Velour, and a tonneau cover. Finished in Guards Red over a Cashmere/Black partial leather interior and a Black soft top, it rides on attractive Fuchs alloy wheels with centers finished in matching Guards Red, a standard feature for the Slantnose.

The accompanying CARFAX Vehicle History Report, with its initial entry in 1994, shows registration history in New York and New Jersey. The car was acquired by the consignor in 2023 and subsequently sent to Paul Miller Porsche in Parsippany-Troy Hills, New Jersey for a complete technical inspection and service. The Porsche Classic Technical Certificate, issued on 11 October 2023 and available for review, found the engine and transmission numbers to match factory records. Furthermore, the written report notes that the paintwork, interior, body, and suspension were all in “excellent condition,” and that the engine showed “no visible/obvious leakages.”

Today this fully matching-numbers factory Slantnose Cabriolet offered with just 8,393 original miles at the time of cataloging and includes its original books, tire inflator, tool kit, and convertible boot cover.