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BMW M4 spied in coupe and convertible form

From the sound of it, we'll have to wait until the Detroit Auto Show to see the production version of the BMW M4, but spy shots show the new hi-po BMW testing recently in both coupe and convertible form. Showing a lot more skin than recent spy shots, these M4 prototypes look very similar to the M4 Concept we saw at Pebble Beach.
Carryovers from the concept car include the funky mirrors, bulging hood and the slotted front fascia vents, but the rear fascia seems to be missing the added flair of the concept and, as expected, the carbon fiber front splitter and exhaust tips are also missing from these M4s. Like the current M3 Convertible, the drop-top version of the M4 will utilize a retractable hard top.

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 raises pricing on many models

Buyers interested in a new BMW will start paying a bit more for their Ultimate Driving Machines, beginning yesterday. The Munich, Germany-based manufacturer has announced price hikes across nearly its entire range, covering model years 2013 and 2014, that will sting higher-end customers in particular.
Price increases are enough to get any consumer riled up, but the incremental nature of BMW's increase makes it a bit easier to swallow. All 1 Series and remaining 3 Series Convertibles (including the M3 Convertible) will see a $300 increase in price. All current-generation F30 3 Series, 5 Series GT and X3 crossovers will get their price bumped by $200. $500 increases are coming for the 6 Series range (not including the M6), while the diminutive X1 gets just a $100 increase.
Cars on the losing end of the price hikes include the newest M cars, the M5 and M6 Coupe, Convertible and Gran Coupe, which are being bumped $2,000. BMW is adding $1,000 to the sticker of all Z4s and the entire X6 range, including the X6M.