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

Volvo gives T6 engine the Polestar treatment

Just weeks after announcing its Polestar performance kits for the T5-engined cars, Volvo is now offering packages for the XC60, S60 and XC70 models fitted with its turbocharged six-cylinder engine. The T6 Polestar software package adds 25 hp and 30 lb-ft of torque, bringing totals to 325 hp and 355 lb-ft, respectively. Volvo says the added power won't result in greater fuel consumption, as the tuning of the engine only increases power when needed--though we'd imagine most drivers will feel the need often enough to significantly affect mileage.

GT Academy winner to race at Monza

It's been a year since Jann Mardenborough entered the PlayStation GT Academy. On Saturday, he'll be on the track at Monza, going wheel to wheel with Valentino Rossi in the opening round of the Blancpain Endurance Series. Mardenborough won the GT Academy and drove in the 24 Hours of Dubai with fellow Academy winner Bryan Heitkotter in a race-prepped Nissan GT-R.

Hybrid owners sue Ford over Fusion, C-Max mpg claims

Pennsylvania car owners are suing Ford Motor Co., claiming that the 2013 Fusion hybrid and C-Max hybrid are not delivering on promised fuel-efficiency figures, according to a report from Bloomberg. Both hybrid models are advertised to return 47 mpg, but the owners say that number is inflated to seem more competitive among other midsize sedans, according to their court filing. The complaint says car owners who have submitted estimates to a fuel-economy tracking website averaged 38.5 mpg, a 10-mpg difference that can cost an additional $1,800 in fuel costs over five years, Bloomberg reports.