Mercury/quicksilver Parts Tune Up Kit -delco Ign 34235q 1 on 2040-parts.com

Shelby American adds SCCA-ready version to the GT350 Mustang mix

Enthusiasts who want to take the new GT350 Mustang racing in Sports Car Club of America events are getting some help from Shelby American. The Las Vegas-based company, which upfits the 2011 Ford Mustang GT to create the GT350 Mustang, will add a normally aspirated version to the lineup. When Shelby American first announced the GT350 program in January, it centered on a supercharged version of Ford's new 5.0-liter V8 that would make about 500 hp.

Beauties and beasts, the AW list of 13 challenging routes

Everyone has an opinion about the worst road in America--usually it's one in their neighborhood. We poked around and compiled our own list of the 13 roads, highways and interchanges that you should pay attention to--for good or bad reason. Good traction and four-wheel drive can't shield you from falling rocks or shoulderless mountain passes.

McLaren MP4-12C to cost £168,500

McLaren will charge £168,500 for the MP4-12C supercar in the UK. That's the new 2011 price, including the rise in VAT from 17.5% to 20% from 1 January. Today's news means that the MP4-12C will cost £1000 less than a Ferrari 458 Italia, its arch rival, at existing tax rates.