A routine estate cleanup in Los Angeles turned into the kind of story that makes Porsche fans stop scrolling. While clearing out his late father’s property, a man named Gray opened a long-shut garage and found the car he remembered from childhood – a dust-smothered 1989 Porsche 911 Turbo Cabriolet with Slantnose bodywork, hidden away for about 30 years. Aside from the emotional connection, the real question is whether this forgotten 930 is a true factory-built Slantnose or one of the many lookalikes that flooded the scene in the 1980s. That answer will decide whether this is a touching barn-find story, a major collector discovery, or both. A Dusty Reunion With A Very Expensive Memory Gray reportedly grew up around the car, then lost track of it after his father died. When he finally found it, the Porsche looked rough even by garage-find standards. Drywall dust, grime, scattered debris, and old bodywork marks covered the car, and one tire was missing when it came time to pull it out. Inside, though, the find got personal – Gray found a small wooden piece carved with the word “Dad,” which he recognized as something he had made years earlier in school. His father had kept it in the Porsche the whole time.Gray brought in the folks over at WD Detailing to clean and inspect the car, and the first look only made the mystery bigger. Under the dirt sat a car that might be far more special than it first appeared, or far more complicated. With an old 911 Turbo, those are often the same thing. The Slantnose Is A Rare Bird WD Detailing The Slantnose, or Flachbau, started as Porsche excess at its best. Inspired by the 935 race car, it first appeared through Porsche’s Sonderwunsch, or Special Wishes, program before becoming a regular North American option in 1987 under code M505. Factory cars got the full treatment – reworked front fenders, pop-up headlights, louvered vents, boxed rocker panels, and the kind of hand-finished opulence that made a standard 911 Turbo look almost shy. Porsche says the shape came straight from the 935’s race-bred look, and it charged buyers a huge premium for the privilege.That is why 1989 matters so much. It was the final year of the original 930 generation, and Porsche finally gave the Turbo a five-speed manual instead of the old four-speed. That alone makes 1989 cars more desirable, but add the Slantnose package, and values jump fast.Recent public sales show how serious the market has become – a 1989 factory Flat-Nose Cabriolet sold for $428,500 at RM Sotheby’s Miami 2025, while a 1989 factory Slantnose coupe brought $280,000 at Broad Arrow’s Amelia sale. Even the production totals carry some intrigue – depending on whether a source counts the U.S. alone or North America as a whole, the 1989 Slantnose Cabriolet run usually lands somewhere around 50 to 75 cars. Either way, nobody will call it common. Is This An Original Slantnose? WD Detailing Here is the wrinkle, and it is a big one. The car reportedly carries a VIN that points to a Turbo, but the engine in it now is said to be a naturally aspirated flat-six. That suggests an engine swap somewhere along the line. On top of that, the Slantnose body itself still needs proper authentication. The 1980s created a small army of Slantnose conversions.Some were crude, and some were excellent. Some were so convincing that they still fool people until the paperwork, option sticker, stampings, or build records tell the truth. Porsche’s own history with Special Wishes cars only makes that detective work more important.Source: WD Detailing