Banshee Billet 35mm Rear Axle Lock on 2040-parts.com

Porsche Exclusive to offer Powerkit and Aerokit for 911 Carrera S

Porsche's in-house Exclusive custom division on Thursday introduced new power-enhancement and aero-enhancement kits for the 2013 Porsche 911 Carrera S. The Powerkit boosts the 3.8-liter flat-six engine's output to 430 hp, up from 400 hp. The extra power comes courtesy of redesigned cylinder heads and new camshafts, along with modifications to the electronic engine-management system.

Autoweek in review: What you might have missed

The rain-delayed Daytona 500 provided multiple headlines this year: Matt Kenseth won the big race, while Juan Pablo Montoya crashed into a jet dryer under caution and Brad Keselowski tweeted from his race car. It was a 500 to remember as NASCAR went prime-time on Fox on Monday night. Click here for all of the Daytona 500 coverage.

Concept Car of the Week: Renault Vel Satis (1998)

The approach to the design of top end models varies greatly depending on the manufacturer's heritage and the cultural differences of each country. It might be a conventional combination of wood and leather for some, power and technology for others, but it is generally packaged into a three-box four-door sedan or two-door fastback. Renault on the other hand had a much more cutting edge vision of what a luxury automobile could be.