Carter Fuel Filter, 5/16 Inch. Item: 4143 on 2040-parts.com

Porsche celebrates 50 years of the 911 at Pebble Beach

Seven generations across 50 years; nobody has ever matched what Porsche has done with the 911. What started out as the Porsche 901 quickly became the 911 – and wouldn’t take long to become a legend. As one of the most accomplished road-going supercars ever created, it's easy to see why the 911 is also a consummate champion in the motorsport arena – and to celebrate that fact, at Pebble Beach 2013 there was a huge array of road and race 911s, courtesy of Porsche itself along with a stack of private owners.Click through the gallery to see our pick of these great cars...

Lumma Design tunes the BMW X6

Custom-body designer Lumma Design worked over the fire-breathing BMW X6 to create an even more powerful version bolstered with carbon and aerodynamic enhancements. It's called the Lumma CLR X 650 M, and as always, speed is paramount. It pumps out 670 hp and has a top speed of 193 mph.

First Sight: BMW 4 Series

Within BMW, it was an ongoing discussion for two decades: what to call the coupé version of the 3 Series? With the new model pictured here, the advocates of change got it their way. The proliferation of models most likely tipped the scales – besides the 3 Series sedan, there is the Touring, the 'Gran Turismo' and the China-only long-wheelbase version.