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BMW M6 amped up for track duty by Risden

Risden Engineering is a bit of an unknown, if we're being completely honest - we have yet to report on the company to date, and its corporate website is really an information desert save for the name and a few email addresses. Even the press release that we requested from Risden's contact person is short and vague. That's all pretty much okay with us as long as the shadowy tuners, you know, make good on this sweet-looking BMW M6 racecar thing.
Dubbed the Risden 6R, we're told that the M6 modification will result in a vehicle that is more adept at track work, while still being street-legal. In terms of specifics, we read that a full aero kit will be involved, with one fixed and one retractable rear wing (hard to miss). There are obviously new wheels, and the company has also added a fully adjustable suspension, a four-point roll bar and a new braking system - all while reducing curb weight overall.
Apparently more details are to follow after the 6R's official release in the first quarter of 2013. We wait with bated breath.

Watch the BMW M4 GTS lap the Nurburgring in under 7:28

When BMW unveiled the new M4 GTS back in October, it said it could lap the Nurburgring in 7 minutes and 28 seconds. That's all well and fine in terms of bragging rights, but what Bimmer enthusiasts have been waiting for is the proof. And here it is, in ultra-HD 4k glory. In the video above, you can see the new M4 GTS scything its way through the Green Hell of the Eifel mountains. Behind the wheel is M GmbH engineer and racing driver Joerg Weidinger, who helpfully narrates the video to show us exactly how he tackled each and every corner along the 14-mile circuit. Which may come in handy for those with a season pass to the Nordschleife, but the rest of us are more concerned with that lap time and how it holds up. To put it plainly, the 7:27.88 lap makes the new GTS not only the fastest in the M3/M4 line to date, but the fastest production Bimmer ever clocked around the 'Ring. It handily beats the previous M3 CSL (7:50) and the stock M4 (7:52), and even trounces more powerful Bavarian machinery like the Z8, M5, and M6. There've been a handful of BMW-powered racers, motorcycles, and prototypes (not to mention the McLaren F1) that have clocked faster times, but as far as four-wheeled, standard production Munich-mobiles go, the new M4 GTS is the new King of the Ring. It also just so happens to match or beat the best times clocked by the more exotic likes of the Ferrari 458 Italia, McLaren MP4-12C, and Porsche Carrera GT – putting the M4 GTS in rare company indeed.

Are you a BMW M4 GTS track car in disguise?

BMW is always happy to extract a little bit more gumption out of its M cars, just look at the latest 30th anniversary M5 or even the earlier CSL variants of the M3 for proof. Now, It looks like we might be getting the first glimpse of an even hotter M4, and it's wearing very interesting livery.
Our spies recently shot this M4 that could preview a future GTS version. It's all done up in MotoGP decals, but that might just be a ruse. This car sports a camouflaged lower air dam and rear wing, but those parts don't appear to be from an actual series safety car. The chin spoiler seems larger, and the rear wing is completely different. You can also spot an obvious Recaro logo on the driver's seat in one of the photos. Plus, the BMW emblem is removed at the back.
The disguised changes and odd choice of decals make this prototype incredibly weird. A BMW exec said at the beginning of the year that there were "no plans whatsoever to make a lighter, harder version just yet," of the M3 or M4, despite earlier rumors to the contrary. Check out the gallery to see what you think this is.