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BMW M3, M4 let loose on the 'Ring

We just posted our first drive of the 2014 BMW 435i yesterday, but for those wanting even more power from this stylish coupe, help is on the way. From the sounds of it, BMW will be showing off a production-ready concept previewing the M4 next month at the Pebble Beach Concours d'Elegance, but until then, we have some new spy shots of the performance coupe being tested at the Nürburgring, along with its four-door counterpart, the M3.
Despite all the camouflage, it doesn't take much imagination to picture what both cars will look like, since we can clearly see the more aggressive front fascia and beefier brake setup. One interesting element we see on both cars is a double bubble roof that is almost certainly made from carbon fiber. Based on our report earlier, both the M4 Coupe and M3 Sedan are expected to debut at the 2014 Detroit Auto Show.

BMW to offer carbon fiber wheels in a year or two

The Citroën SM sat on the first set of production glass fiber and resin wheels in 1972 when parent company Michelin developed the exotic hoops in order to take the SM rallying. It wasn't until 2008 that we got the first all-carbon-fiber wheel for passenger cars in the form of a prototype model from Weds Sports in Japan that remained a prototype. Australian company Carbon Revolution followed that a year later with its CR-9 all-CF wheel, first introduced on the Shelby Ultimate Aero and now available for independent purchase for about $15,000 per set. BMW could be the first OEM to offer entire wheels in carbon fiber reinforced plastic in two years.
The wheels - either all-CFRP or using a CFRP rim and alloy spokes - were shown off during BMW's Innovation Days in Munich and are products of the development work done on its i-branded cars. The full-CFRP wheel is 35-percent lighter than a forged alloy wheel, the hybrid alloy and CFRP wheel is 25-percent lighter, making for a decent drop in unsprung rotating weight. As demonstrators during a tech day the wheels aren't yet in the pipeline for production and EU approval, but an article in Auto Express claims that they could be on the market as soon as two years from now.
Other possible parts include a full carbon fiber steering wheel and propeller shaft, the latter of which is coming as a single-piece component on the new M3 and M4. BMW is also talking up its use of secondary carbon fiber - waste material from i3 and i8 production - that can be used for items like IP support structures, seat frames and spare wheels in place of traditional metals like aluminum and magnesium. There's an excerpt of the Innovation Day press release below with more details.

BMW shows up-armored X5 concept and we can't get near it

BMW has brought a slightly different concept vehicle to the 2013 Frankfurt Motor Show. Rather than something that foreshadows a future product or a new design direction, the Munich-based manufacturer has brought an X5 that's designed to be shot at. It's called the Concept X5 Security Plus. The Concept X5 name is a bit misleading, though. It's based on the 2014 X5, while BMW already builds an armored CUV, called the X5 Security. The concept tag has to do with the "Security Plus" part.
Engineered to be compliant with VR6 security standards - the current X5 Security is for VR4 standards - the Concept X5 will quite happily shrug off direct attacks from an AK-47. Thanks to sealed joints, high-strength steel moldings, high-performance steel body panels and special, polycarbonate-coated security glass, Kalashnikov's finest, whether used as a firearm or as a melee weapon, would be useless against this X5.
Built alongside the standard X5 in BMW's Spartanburg, SC factory, the X5 is shipped to a BMW facility in Toluca, Mexico for installation of the armor and security features. The company claims this delivers a more thoroughly engineered protective solution than aftermarket retrofitting.