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Check out the trick way you access the tire valve on this BMW Alpina B6

The wheels are one of the first things you notice when checking out the 2015 BMW Alpina B6 xDrive Gran Coupe. The 20-inch aluminum alloy rollers have 21 spokes that spray out from their hubs, creating one of Alpina's signature design features. But there's also plenty of function to go along with the stylistic form of this hotted-up BMW 6 Series Gran Coupe.
By rotating the Alpina roundel and unlocking the center hub, you gain access to the tire valve and bolts, which are hidden inside. They're literally kept under lock and key, and they protect your Alpina's wheels from the elements and theft. This unique center-fill system employing a hollow spoke isn't a new setup for the favored BMW tuner, but since Autoblog had one in our offices this week, we thought we'd take the opportunity to show the unique mechanism in case you haven't seen it before. Check it out in our brief video below.

These BMW M6 GTLM racing liveries are great

This weekend we'll see a whole new crop of racing machinery line up for the start of the 24 Hours of Daytona, including the new BMW M6 GTLM. So far we've only seen it in flat black, but now the Bavarian automaker has revealed two special liveries for the two cars it will be fielding in the race this weekend. The number 25 car features a throwback livery that reinterprets BMW's classic racing stripes of red, dark blue, and light blue over white bodywork. It's designed to be reminiscent of – and even features images of – legendary racing machinery from the Roundel marque's history. Those include the 3.0 CSL that wore the same number when it took the company's first win in the US at Sebring in 1975, the M1 sports car from the early 1980s, the V12 LMR that scored BMW's only Le Mans victory to date in 1999, and the M3 GT that dominated the American Le Mans Series in 2011. The second car features a more futuristic livery, wearing the number 100 to mark the automaker's centenary and a multicolor lattice design applied with a luminescent 3D-effect reflective vinyl on a white body. They'll both be fielded by BMW Team RLL, a partnership between the manufacturer and Rahal Letterman Lanigan Racing (of Indy fame), which took a class win at Laguna Seca last year. The new M6 GTLM replaces the previous Z4 GTLM and will proliferate across racing grids in motorsport series around the world following its race debut this weekend. But it won't be the only new piece of racing kit turning a wheel in anger for the first time at Daytona; the new Ford GT and Ferrari 488 GTE will be competing in the GT Le Mans class alongside proven competition machinery. BMW Team RLL reveals 100th anniversary livery for the BMW M6 GTLM race cars in Daytona. Daytona (US), 27th January 2016. BMW Team RLL today revealed two commemorative 100th anniversary liveries for the new BMW M6 GTLM race cars, with which Bobby Rahal's (US) team will compete in the 24 Hours of Daytona (US). The race forms the first round of the 2016 IMSA WeatherTech SportsCar Championship (IWSC). The number 25 car sports a look reminiscent of the iconic BMW 3.0 CSL, which contested its first season of racing in North America back in 1975 and claimed the first victory in Daytona 40 years ago. The second BMW M6 GTLM will race with the number 100. To mark BMW's 100th anniversary this year, its livery looks to the future.

BMW M4 Concept leaked ahead of Monterey debut

Last month, we heard that BMW might be bringing a concept previewing its next M4 sports coupe to this year's Monterey festivities. Well, thanks to the folks at USA Today, we have absolute confirmation of this by way of some leaked images. And goodness, she's certainly a looker.
While a few of us still find some of the 4 Series' design to be a bit awkward, it's hard to not immediately warm up to the aggressive bits of this hotter M4 concept. It certainly looks the business of a proper sports car, and a worthy successor to the M3 coupe. Of course, a lot of this will likely be toned down for the production version, which we'll likely be seeing at the 2014 Detroit Auto Show in January, along with its four-door M3 kin.
The official M4 Concept details will be revealed later tonight, but for now, have a look at a few shots of the golden show car in our gallery of leaked shots, above.