A truly one-of-a-kind Dodge Viper concept car is up for sale. Covered in carbon fiber, with a 615 hp McLaren engine, the 0-60 is 3.5 seconds.

German tuner Geiger slaps a Kompressor on the Hummer H3 V8 to the tune of 423 hp and 502 lb-ft (680 Nm) of pure power.

Tuning experts Hamann are to transfer their engineering know-how on to the Bentley GT Speed, the fastest production Bentley ever, pictured. Expect lots of roaring horses.

Branew, the Japanese tuner, is set to reveal one of the first tuning kits for the new Nissan 370Z t the Tokyo Auto Salon in January 2009.

Reiter Engineering re-engineers a GT3 racing Lamborghini Gallardo back to street legal-status. This Strada model is quite stock, bar a few changes.

Japanese tuner Ings has released an N-Spec body kit for the Lancer Evo X, with track-tuned ducting and an Z-Power rear wing.

Tuned Astra will come with up to 300 hp and a racing suspension, Corsa gets 230 hp out of its 1.6 turbo. Both hot hatches will come as either Sport or Racing versions of the VXR.

Revenge Designs, noted for its tuning work on the Pontiac Solstice and GTO, will debut its first original vehicle, the GTM-R, at the North American International Auto Show in Detroit this January.

Porsche specialist 9ff has developed the 1300hp DraXster with the apparent intention of drag-racing domination.

The new BMW Z4 Roadster was revealed to us earlier this month, and is yet to be unveiled to the public but that hasn't stopped Germany's Dstyle from releasing new enhancements for the current generation model.