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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.

China probing German automakers over spare parts

The Chinese market has proven to be a boon to German luxury automakers. However, the way that the companies have allegedly been controlling their supply of spare parts has begun to draw the ire of the nation's government. According to insiders speaking to Bloomberg, officials from the country's economic planning organization have opened a probe into Audi, BMW, Mercedes-Benz and some Japanese carmakers over claimed price inflation and limiting supply.
Specifically, the investigation centers around two aspects of how the companies do business, according to Bloomberg. Investigators want to know whether the original equipment component makers are able to sell spare parts only to automaker-authorized dealers or if they are also available to independent shops. There is also the issue of whether the price markup on replacement pieces is too high. The tight controls could be partially explained by China's reputation for producing counterfeit parts.
Evidently, the investigators haven't checked parts prices at car dealers elsewhere in the world. At least in the US, paying more at the dealer for factory components just goes along with owning a vehicle. If evidence of price fixing is found, the companies could face fines the equivalent of millions of dollars, according to Bloomberg.

BMW dismisses Tesla tie-up talk

Despite recent rumors to the contrary, don't expect to see much collaboration between Tesla and BMW in the near future. Based on some rather prickly statements from the German automaker, Elon Musk might have even burnt some bridges in Bavaria with his latest proclamations. The spat stems from Musk's recent interview with German magazine Der Spiegel where he discusses future collaboration with BMW on "battery technology or charging stations" and the possibility of a battery factory in Germany. But apparently, any future tie-ups are news to the Bavarian automaker. In an interview with the German business publication Wirtschafts Woche, an unnamed spokesperson for the company claims Musk said it all for PR value and swats down most of the statements. BMW has no intention of acquiring Tesla shares, and they aren't working together on any tech. There's not much chance for future cooperation on a battery factory in Germany, either. BMW believes that the cells can just as easily be purchased from suppliers, like other auto parts. The one slight concession is that the spokesperson said that the German automaker would be willing to supply Tesla with carbon fiber. That's not an exclusive offer, though, and the company is open to negotiate such a deal with any interested automaker.