A 1954 Studebaker Champion Starlight just showed up on Bring a Trailer, and it is not the kind of Studebaker anyone’s grandmother drove to church. This one makes 550 horsepower, sits on a tube-frame chassis derived from a 2015 NASCAR Cup car, and somehow still wears California license plates.

The car was purpose-built for La Carrera Panamericana, the legendary Mexican road race that chews through mountain passes and desert heat across hundreds of brutal miles. It’s the kind of event that destroys half-hearted builds before lunch on day one.

And yet Studebakers have owned it for years. At the race’s 75th anniversary running last year, three Studebakers swept the podium in the fastest open class, blowing past a modern Porsche 911 GT3 running in a lower category. That’s not a typo.

A shape penned seven decades ago is still more aerodynamically efficient than most people realize. When you hang that slippery body over a proper racing chassis, the results speak for themselves.

This particular car backs up that pedigree with serious hardware. The suspension runs Öhlins dampers and Eibach springs, the brakes are Alcon units, and the wheels are 16-inch BBS three-piece sets. Inside, there’s full fire suppression, racing seats, and halo restraints — the kind of safety package you’d expect in a professional endurance car, because that’s exactly what this is.

Beyond the Panamericana, the Studebaker has logged more than 300 laps over 25 hours at Thunderhill, one of the most punishing endurance venues in the country. It was built to suffer and keep running.

Under the hood sits a Chevrolet 6.0-liter small-block V-8, assembled by a North Carolina engine builder to produce roughly 550 horsepower on 92-octane pump gas. That last detail matters. The Panamericana runs through remote stretches of Mexico where race fuel isn’t an option.

You fill up at whatever roadside Pemex station appears. The engine feeds a five-speed sequential manual gearbox driving the rear wheels.

The chassis itself is custom-fabricated but follows NASCAR Cup geometry — a layout designed for sustained high-speed punishment, not weekend autocross duty. Wrapping all of that in a body shaped like a 1954 Studebaker coupe is either inspired madness or engineering poetry, depending on your tolerance for contradictions.

Then there’s the street-legal detail, which elevates the whole thing into the absurd. The car carries California registration, currently listed as Planned Non-Operation to avoid fees. La Carrera Panamericana requires its competitors to be road-legal, much like international rally cars, so the plates aren’t a gimmick.

Could you theoretically drive this to get tacos? Sure. Would it be quiet, comfortable, or practical? Not remotely. But you’d arrive faster than anything else in the parking lot, and nobody would see you coming because they’d be looking for something that doesn’t resemble their grandfather’s sedan.

The auction closes July 14 on Bring a Trailer. No reserve price has been mentioned, and given the racing provenance and the sheer weirdness of a NASCAR-chassied Studebaker with valid plates, the bidding war should be worth watching on its own.

Studebaker closed its doors in 1966. Sixty years later, its cars are still winning races against machinery that costs five times as much. The brand may be dead, but the shape refuses to quit.