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

Rennsport Reunion IV closes with Porsche 917s tearing around the track

Rennsport IV, three days of serious Porsche love at Mazda Racway Laguna Seca, concluded on Sunday with a half-dozen races around the picturesque track near Monterey, Calif. And while there were a variety of all things Porsche to see and hear through the three days, Sunday saw some of Porsche's most powerful race cars take to the track. It was certainly a case of saving the best for last.

Tesla Model X SUV will ONLY be available with four wheel drive

The Tesla Model X (pictured) will only be available with 4WD The Tesla Model X does promise to be a very appealing SUV, even if its main USP for business users – zero BIK – will have been scrapped by the time it arrives in the UK. When it does arrive, prices are expected to be similar to the Model S Saloon and, just as with the Model S, Tesla are planning a variety of battery capacity options and, we thought, an entry-level rear wheel drive model. But Green Car Reports, in response to a reader enquiry, has got confirmation from Tesla that they have now decided that all Model Xs will come only with the 4WD powertrain fitted.

2010 Ford Mustang: Saleen plans two go-fast models for next year

Saleen, the famous performance brand, lives. And it's looking to roll out two go-fast Mustangs in the next year. The first will be unveiled at Mustang Week in Myrtle Beach, S.C., later in July.