The 4-speed Porsche 930 Turbo Carrera owned by Steve McQueen has been set for auction. The Porsche, the last special-order McQueen ever purchased, is an original 1976 930 finished in a stunning slate gray.

Because of the star’s untimely death, the chassis 9306800408 – the 1976 Porche 930 – was the very last of his special-order cars. His son, Chad, says, “This car is rich in history. This is the last of the McQueen cars, really. That’s known. That’s real.”

The car boasts switch-to-shut-off taillights and a set of wider wheels for both the front and the rear of the car. It’s powered by a turbocharged, 3.0-liter flat-six engine without an intercooler. His son adds, “My dad had little things done to it. Like on the dashboard, he had a switch put on so it would kill the rear lights in case he was being chased on Mulholland Drive.”

Mike Regalia, car collector, restorer, and the Porsche’s current owner, adds, “Later he put the 8s and 9s on it. It came with 7s and 8s, which were the standard wheels he ordered. Then he put 8s and 9s on it; but you know, all of those are personal touches that Steve had done—and he didn’t do many to it—Porsche 930 Turbo Carreras were pretty out-of-the-box balls-out cars.”

Set for auction at Mecum Auctions between August 13 and 15th in Monterey, California, a portion of the proceeds will benefit The Boys Republic, a non-profit treatment community for troubled youngsters in Chino Hills, California that was close to McQueen’s heart.

Of the sale, Regalia notes, “I think what we’re going to create here [with the offering of this car] is really the life story of Steve McQueen; the life story of what the Boys Republic meant to Steve McQueen. I think the future owner of this car is getting all of that, in addition to getting a truly great collector car.”