This 1987 BMW M3 will leave the CCA judges and value speculators scratching their heads and breathing tire smoke. This is the first one we have seen on offer with a V10 engine swap from a E60 M5, which is said to put down 550 horsepower. The car features coilovers and hefty 19″ wheels, and is quite cleanly prepared, not really hinting at the engine swap with anything other than the exhaust note, which must be insane. Find it here on Mobile.de in Sweden for 40,000 euros (today ~$55k).

We see the smoked lighting treatment on many M3s in Europe, and don’t usually like it but think it works on this car. We are thrilled that the wheels are a nice contrasting silver instead of black, and that the windows are not tinted. Stance is dialed in thanks to coil-overs at all four corners. Check out the better photos and some tech specs here on Garaget.org.

Interior is our preferred black leather, and looks entirely stock apart from two aluminum pedal covers. When sitting in these interiors, you don’t feel that mods are necessary. They look and feel great.

The engine, and its giant split intake plenum, seem to fit reasonably well inside the E30 engine bay. We’d love to know more about what sheet metal work was necessary, hopefully not much. 6-cylinders fit just fine here, so we suspect that width is the issue more than length.

As the original M3’s run up in value along with all the other icons, we still love to see tastefully modified cars even more than the stock survivors. If the rear axle can somehow stay in this car under power, we’d love to run this car through a European cloverleaf freeway entrance and wind through second and third gears until we got scared. Wow.