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Detroit auto show 2013: CAR's A-Z guide

Welcome to CAR Online's coverage of the 2013 Detroit motor show. This is your handy A-Z guide with our full stories on all the new metal to bow in at Detroit. Click 'Add you comment' below to tell us your favourite concepts, and which is your Detroit show star.

Audi R8 V10: R8 V10 Challenge Extreme Edition by STaSIS launched

Audi R8 V10 Challenge Extreme Edition by STaSIS Engineering gives 710bhp. There’s not a lot wrong with the Audi R8 V10. In fact, if you want a supercar you can use everyday you pretty much have a choice between the Audi R8 and the Porsche 911.

Traffic Booster honks at drivers as soon as the light turns green

The Traffic Booster is a simple little device: a few resistors, some switches, a box with a cheap car horn in it. The schematics are here for easy home replication, dog-eared copy of "The Anarchist Cookbook" not required. But the apocalyptic infuriation it causes is priceless, and if deployed across a city center, the ensuing riots will cause untold millions in damages.