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Vorsteiner BMW M4 GTRS4 shows how to do a widebody at SEMA

Part of the joy of the SEMA Show is that all of the best tuners in the world are competing to show off their wares, and the challenge often pushes the companies into some absolutely insane directions. Case in point: Vorsteiner and its ludicrous GTRS4 wide body kit with the BMW M4.
According to Auto Evolution, the kit reportedly adds 4 inches in the front to fit 10.5-inch-wide wheels and a massive 7-inches more in the rear to snug in 13.5-inch-wide wheels, but spinning around the BMW in these images makes the changes look even more extreme. Beyond just the extra room in the fenders, the lower air intakes are ready to suck in huge volumes of cool air, and there's a front splitter to keep things planted. The front and rear extensions are joined by side sills that grow the farther back they go. Finally, at the rear, the M4 gets a reworked diffuser with mesh inserts.
This is just the type of automotive craziness that makes SEMA interesting. Take a lot at it for yourself in the gallery.

Former BMW M boss and Maserati CEO killed in freak motorcycle accident

It's a tragic coincidence that on the same weekend the BMW M4 Coupe Concept was introduced in Monterey, one of the men most integral to BMW's M and Motorsports divisions, Karl-Heinz Kalbfell, was killed in England. Kalbfell, a vintage motorcycle enthusiast, was set to compete in the Lansdowne Classic Series at Brands Hatch and had an accident during a practice session. After going wide at Druids Corner and falling, he was hit by a competitor following close behind and died of his injuries after being transported to hospital.
Kalbfell, an engineer, began his career at BMW in 1977 in the communications department; a decade later he was chairman of BMW M GmbH, overseeing development of some of the cars responsible for the myth of M. In 1994 he was named chairman of BMW Motorsport, and his cap full of feathers includes getting the BMW V12 into the McLaren F1, getting the BMW V8 into two Morgan cars, along with developing BMW's Formula One engine and return to the sport. Not incidentally, he also assumed leadership of Project Rolls-Royce after BMW bought the British marque in 1998, which means he oversaw the Goodwood factory upfit and the creation of the Phantom.
He left Rolls-Royce for a brief stint at Fiat, heading Alfa Romeo and Maserati, then went into consulting for clients like Lotus and Paragon, who built the Artega GT. As Autocar notes, Kalbfell "had an abiding sense that customers needed to be attracted to cars by their aura and reputation, not just their engineering." He will be missed.

Looking back at 84 years of BMW roadsters

Today BMW is a top player in the luxury vehicle market, but it wasn't always so. With origins as an airplane engine builder early in the 20th Century, it broke into the automotive industry when it bought Automobilwerk Eisenach in 1928. That German manufacturer was licensed to build the Austin Seven under the name Dixi DA-1, which could be had in a roadster body style. In 1929, BMW dropped the Dixi name, and by 1936, it was building a car it designed in-house, the 326 sedan. That was followed by the company's first roadster of its own design, the swoopy two-door 327 of 1937.
XCAR picks up there, and gives a history of BMW's iconic roadsters starting with the 327, ending with today's Z4, and covering everything in between - including the beautiful post-war 507 of 1957 and the funky, plastic-bodied 1989 Z1.
The video, which we've included below, is a good history lesson and a great chance to see a bunch of classic BMWs, spanning 84 years, all driven back to back within the safe confines of a racetrack. When you have a spare 20 minutes, go ahead and take some time to watch it.