Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Cash for clunkers: Is it ready for prime time in America?

One proposed solution to prop up new-car sales in the United States involves paying bonuses to owners of older vehicles who send their cars to the scrapyard and buy new ones. Proponents say that not only does the auto industry benefit, but so does the environment, as emissions decrease and fuel economy typically improves in newer models. Critics, however, say that scrapping older vehicles hurts collectors by reducing the number of older models available and also hurts those least able to afford to buy newer vehicles by driving up the price of used cars.

Porsche 911 GT3 R Hybrid race car revealed

Porsche will bring its latest hybrid know-how to the racetrack in the form of the new 911 GT3 R Hybrid, revealed here for the first time prior to a planned public premiere at the Geneva auto show in early March. Developed by a team of engineers at Porsche's Weissach R&D center, Porsche plans for the stripped-out race car to act as a rolling laboratory. The German carmaker wants to explore the potential of hybrid drivetrains in a racing environment before an expected announcement that it will return to the 24 Hours of Le Mans in a factory capacity, perhaps in 2012, with a race car boasting technology based on that used in the 911 GT3 R Hybrid.

2014 Mercedes-Benz S63 AMG revealed

Mercedes-Benz's AMG performance-car division has officially revealed its new 577-hp S63 AMG ahead of the rapid sedan's public Frankfurt motor show debut in September. Several traditional AMG styling mods distinguish the S63 from recently introduced but lesser S-class models (“S-class Stunner,” Autoweek, May 27). They include a deep new front bumper, chromed blade grille, twin-turbo V8 badges on the side and beefed-up sills.