Gemballa Mirage GT

Based on the Porsche Carrera GT, this car, according to Gemballa, could comfortably top 1000 bhp and chase down the Bugatti Veyron. But this twin-turbocharged version of the 5.7-liter V10 has a 'mere' 750 bhp. Enough to see 60 mph in 3.4 seconds and a theoretical top speed of 250-plus mph. If it looks like a ridiculous flight of fancy, then you're wrong, as one has already found its way to Dubai. In white, of course. Look for an upcoming road test.

Eibach AMV8400+

The Eibach AMV8 is good, but don't expect it to break the 400-mph mark. The name denotes the horses-actually, there are 425. A complete re-jig of the baby Aston uses Prodrive performance parts that add 45 hp to the bottom line and an Eibach suspension that should stick to the road like the burnt remains of its Pirelli P Zeros. Carbon fiber aerodynamic additions look the part and should help this beauty to its top end of 185 mph.

H&R Mission 400 Plus

Tucked away in a corner was potentially the heaviest hitter. The H&R Mission 400 Plus, developed with Jurgen Alzen Motorsport, will either break the 400-kph (248.56 mph) mark and threaten the Bugatti Veyron's position as the fastest production car in the world, or it will just take off and fly. It works in the wind tunnel, but when you strip a Carrera S of its wing, lower the roof by 5cm and then jack horsepower up to 1070 bhp and torque to 920 lb-ft, anything can happen. The engine comes from the Turbo model, albeit heavily reinforced. Expect the car to go for the record in the first half of 2007 with Alzen himself at the wheel. He has raced everywhere and is a Nordschleife specialist, but this should still be the hairiest ride of his life. Don't, however, expect the car to go on sale; it would kill most mortals.

Tech Art Wide Body

TechArt has gone quite mad with the introduction of the TechArt Widebody, based on the Porsche Cayman S. It's not subtle, but that's the point. And the 8cm extra width allows for a wider track, 20-inch wheels and additional cooling. The 3.4-liter engine has been bored out to 3.8, producing 385 bhp and 300 lb-ft of torque; zero to 60 mph in 4.9 seconds, 190-mph top speed.

Cargraphic GT3 RSC

Ever prepared to push the envelope, Michael and Thomas Schnarr bored the GT3 RSC's engine out to four liters, liberating 420 bhp. Cargraphic won the GT class of the 2006 Tuner Grand Prix with its 996 model, beating the more powerful GT2 models with sheer poise and balance. With the extra pace placed in the new car, we're putting a bet on for 2007.

Carlsson CK

Carlsson brought out its Mercedes CL conversion with 430 bhp under the hood. Adding a supercharger has turned the five-liter CL into a comfortable rocketship. Subtle external modifications combined with serious performance gains appeal to those with deep pockets and the determination to blitz down the autobahn. Carlsson's biggest cars are all capable of bursting the magic 200-mph bubble, normally the preserve of less refined supercars.

AC Schnitzer Tension

Production versions of the AC Schnitzer Tension, spawned from the concept launched last year, will number only 50. The base car can be anything from a 630i right through to the M6. For those cursed with small engines, Schnitzer will undoubtedly offer its 5.1-liter V8 with 411 bhp.

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