2012 Polaris Rush 800 Left Spindle 600 Switchback Assault Indy 1823801 2013 2014 on 2040-parts.com

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.

Which cars Britain really bought in 2013: winners and losers

The UK car registration figures for 2013 are now out – and sales have reached their highest figure since 2007. But what’s hot, and what’s not? Some types of car are selling better than ever, while others have nosedived.

Nissan Sentra wrings out 1 mpg more to sweeten payout

Engineers at Nissan Motor Co. are scurrying to eke another mile or two per gallon out of their vehicles to win customers who come looking for federal cash-for-guzzlers money. "We want as many of our products as possible to pop up on the shopping list," Nissan North America spokesman Brian Brockman says.