With its engine upgrade kit, Kicherer gets CL600's V12 biturbo engine's power increased from 517hp to more impressive 570hp and 900Nm (663lb-ft).

When Mercedes-Benz unveiled the convertible version of its very rare SLR McLaren 722 S Coupe late last month, all it had for us were ethereal renderings of what the car would look like. This week the German automaker has given unto us a gallery's worth of high-res photography showing what is likely to become the world's fastest convertible.

Maserati GranTurismo's lucky owners may soon be able to order a piece or two of tuning parts made of high quality carbon fiber by the American tuning specialist Elite Carbon.

Video: 47 minute Nissan GT-R documentary

As you'd expect from a wide body kit, the main highlights include new front and rear aprons, widened fenders in both the front and back, new side skirts, a roof and trunk spoiler and a new vented hood. Another notable change is the presence of the always popular 20-inch wheels with performance tires, while a new stainless exhaust system completes Vitt's CL package.

Official images demonstrate that the upcoming Porsche Panamera four-dour luxury coupe doesn't look that bad. Well, it even looks good, I dare say.

Italian tuner TRC-Marangoni has revealed a new body kit for the Alfa Romeo's new Mi.To. hatchback heavily drawing its inspiration from the much more expensive Ferrari F430 sports car. Some people might actually like the end result.

The new body kit from Carlsson may be ordered for almost the whole range of the luxury Mercedes S-Class sedan, including even the mightiest S 63 AMG supercar.

This is such a wickedly sick 18 minute video. Turn up the volume to watch the new e92 BMW M3 vs Mercedes C63 AMG vs Lexus IS-F VIDEO!!

The German tuner fitted the new Dodge Challenger SRT8 muscle car with a mighty compressor unit increasing its power to impressive 659hp.

We've all seen the miniature Ferrari engine before, but here are some good details on a guy that has put together a working V8 engine that can sit on a kitchen table. The quality of the work is amazing.