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Jaguar XK leaves the lineup

Production of the Jaguar XK stretched from 1996 with the XK8 and will wrap up as the final 50 limited edition XK models roll off the assembly line this summer. The farewell XKs will be branded as "Final Fifty Limited Edition" cars, and will carry the same specification as the current XKR model, along with some added features that celebrate the history of Jaguar and the evolution of the brand's grand touring coupes and convertibles. Under the hood, a supercharged 510-hp 5.0-liter V8 is capable of bringing the XK to 60 mph in 4.6 seconds according to Jag, and an active exhaust system helps ensure the engine note remains prominent.

One Lap of the Web: Motorcycles in revolt

-- Danny Lyon photographed the Chicago Outlaws at the height of the counterculture: Following the gang on his Triumph, Lyon published his candid, brutal shots in 1968 with the title "The Bikeriders." Vice explains why Lyon's book mattered: He rode with them, documented their personal conversations and ultimately glorified the gang and their "existential struggle to be free." The book is due for re-release by the Aperture Foundation. -- Kim Boyle built this gorgeous custom 1978 BMW R100/7 on a shoestring budget, proving that you can't put a price on talent and taste. The as-yet-unnamed bike wears an old-school BMW roundel and some lovely details, including a headlight screen, a seat from a Ducati Monster and a custom 2-into-1 exhaust welded from 32 pieces of tubing.

Audi readies flagship Sport Quattro concept for Frankfurt

Audi will unveil its new Sport Quattro concept at next month's Frankfurt motor show, previewed in a number of sketches. We first saw the Quattro concept back in 2010 at the Paris motor show and three years later the carmaker has produced another iteration, a 2+2 coupé, that measures in at 4,699mm – 419mm longer than the Quattro concept (4,280mm). From what the sketches show, the Sport Quattro retains the chunky C-pillar of the 2010 Quattro concept, the 1984 Sport Quattro and the original Ur-Quattro models, while the four headlamp units are another nod to the original.