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A closer look at the 2015 BMW M3 sedan and M4 coupe: Turbocharged performance is gonna cost you

By the time the 2015 BMW M3 sedan and M4 coupe were revealed at the Detroit auto show, we already knew a lot about what to expect from the Roundel's newest generation of high-performance driving machines. It was no secret, for example, that the new M3 sedan and its two-door counterpart, the M4, will be down two cylinders and a few hundred pounds from their predecessors. Now that we've had a chance to get a look at the cars in production trim, here's a closer look at what's under all the aggressively vented fascias, spoilers and M badges.

One Lap of the Web: Bugatti state of mind

-- Last week, we looked at the new Bugatti exhibit at the Mullin Museum, which taught us more about Bugatti in an afternoon than the last three years of idly flipping through Pebble Beach programs. Having thus immersed ourselves in the House That Ettore Built, we'd really like to drive to work in a faithful Type 35 replica by the aptly named Pur Sang, which Mark Dixon of Octane drove for his 140-mile commute. "You need to keep the revs up while the engine clears its throat and warms its plugs," he writes.

Nissan shares recall info with Carfax

Nissan North America said on Tuesday that it will start providing Carfax with information on safety and emissions recalls for Nissan and Infiniti vehicles. Nissan said it will share vehicle identification numbers of affected cars with the vehicle-history-reports site. Drivers can type their VIN into the site to see iwhether there are any outstanding recall campaigns.