When I was a younger lad, I diligently followed the car magazines. It was in the late 80s that a small California-based firm named after its creator, Steve Dinan, started gaining the notice of the car magazines. The reason why was simply; just as Reeves Callaway had done on the East Coast, Steve Dinan was taking already potent cars and turbocharging them in the Golden State. In this case, it was E28 and E24 M5 and M6s that were getting forced induction, and the results were unreal. At the time, having 400 horsepower put you into the likes of Ferrari, Lamborghini, and a few other exotics. Dinan didn’t rest on those laurels though, and since has become a defacto factory tuner in a similar vein to AMG, though they remain independent. That’s a testament to the quality and reliability of their work. What they produce are improved versions of already fast cars, and today’s 1989 535 is a great example. The E34 was a solid performer in its day, but with a turbo and 300 wheel horsepower, it’s an undercover M5 assassin:
