Wilwood Proportioning Valve on 2040-parts.com

Mazda signs deal with Discovery Velocity to broadcast MX-5 Cup and other races

The Playboy MX-5 Cup is the best racing no one's watching, says Mazda, because it's not on television. The company changed that on Wednesday by inking a deal with the Discovery Velocity channel. Deep cable jokes aside, the MX-5 Cup does present some of the best parity in racing, as well as drivers racing for the love of the sport.

U.S. woman ready to take a crack at world land-speed record

We talk power numbers at AutoWeek all day long. Three hundred horsepower used to be a lot, then 400, then 500. Now we expect our supercars to exceed even that.

Carbon-fiber parts and a software fix help create a lighter, faster Fiat

Chrysler Group's Mopar parts brand and Italian supplier Magneti Marelli have teamed up on a design exercise based on the 2012 Fiat 500 Abarth that shaved weight and added horsepower. The vehicle, called the Venom, has a number of carbon fiber components -- hood and side mirrors, for example -- that makes it about 200 pounds lighter than the 2,512-pound Abarth. The Venom uses software updates and additional exhaust components to boost the Abarth's standard 160-hp 1.4-liter turbocharged engine's output by as much as 25 percent.