Dorman Window Regulator, Rear Left on 2040-parts.com

GM says natural-gas Chevrolet Impala on the way

General Motors said it will sell a version of the Chevrolet Impala sedan with the ability to switch between gasoline and natural gas, part of the automaker's plan for taking advantage of a U.S. drilling boom that has made natural gas a more viable fuel for cars. The dual-fuel Impala, to be announced today by CEO Dan Akerson at a conference here, will have one engine and two fuel tanks -- one for gasoline and one for compressed natural gas.

You don't have to wait until 2011 to go topless in a Camaro

Spending $16,000 or more to make a Camaro into a Camaro convertible isn't a rational decision, but we can certainly understand people wanting one. We drove the concept version of this car from Chevrolet two years ago ("Top This!" AW, July 2, 2007) and loved it. Back then, Chevrolet planned to release a convertible version of the new Camaro in November 2009, but an economic cliff intervened, pushing production to the second quarter of 2011.

Alfa Romeo 4C in action at the Goodwood Festival of Speed (video)

The Alfa Romeo 4C made its dynamic debut (pictured) at the 2013 Goodwood Festival of Speed The long awaited Alfa Romeo 4C finally made its debut in production spec at the Geneva Motor Show in March, and at the weekend the 4C made its dynamic debut at the Goodwood Festival of Speed. To make sure the 4C made as big an impact as possible at Goodwood, we’d expected Alfa to run up the hillclimb in the launch edition 4C, which gets plenty of extra goodies including a carbon fibre body kit and spoiler, but this 4C looked to be a standard model. But even though we’d like to have seen the launch edition with its extra carbon fibre goodies, the standard car gets exactly the same 1750cc 4-cylinder petrol engine with enough get up and go, 236bhp, to move the lightweight 4C (under 900kg) to 62mph in just 4.5 seconds.