If the normal Porche Cayenne is too tame for you, then have a look at the Gemballa Tornado 750 GTS.
Using the Cayenne Turbo as a base, Gemballa starts by hacking off an incredible 550+ pounds thanks in part to carbon-fiber bodywork that provides increased downforce and vents air to the front brakes as well as away from the engine compartment.
The turbocharged V8 has been upgraded in typical Gemballa fashion - displacement has been increased to 5.0-liters, upgraded pistons and connecting rods have been added, and a racing turbocharger provides additional boost. The result is 750 horsepower and 775 lb-ft torque, 0-100 km/h (62 mph) in just 4.3 seconds, and a top speed of 186 mph. Perhaps even more interesting is that all of this mechanical mayhem can be routed exclusively to the rear wheels if the customer so requests it.
Astounding performance yes, but with looks only Darth Vader's mother could love and a €400,000 price tag (around $525k USD), we're guessing Gemballa may have a tough time filling orders for its planned production run of fifty cars.