After 9 month of hard work, German tuner G-POWER has completed their latest project revealing official photos and details with the 2009 G-POWER BMW M3 Tornado. As the company mentioned, the key element on the 2009 G-POWER BMW M3 Tornado is its newly developed supercharger that offers a relative 0,3 bar boost, using gentle soft charging, enabling the vehicle’s V8 engine to output 500 hp and 480 Nm of torque instead of 420 hp and 400 Nm packed by the stock M3 Coupe. Other performance figures regarding the 2009 G-POWER BMW M3 Tornado and achieved through its 6-speed manual gearbox, indicate a top speed of 320 Km/h while accelerating from 0 to 200 Km/h takes only 13.5 seconds (2 secodns quicker than the standard M3).
Exterior mods on the 2009 G-POWER BMW M3 Tornado include 20 inch ligh alloy Silverstone rims wrapped in Michelin Pilot Sport tires and a stainless steel exhaust system that can optionally be made from titanium. More info on the 2009 G-POWER BMW M3 Tornado and price details on the various custom components in the press release below.
G-POWER press release :
For the current BMW M3, G-POWER offers an exquisite supercharger system that sets new standards in regards of design, quality and performance. Using gentle soft charging with just 0,3 bar (relative) boost, the output of the V8 engine is pushed from 420 hp to 500 hp and the torque increases from 400 Nm up to 480 Nm.  
After 9 months of intensive development, starting with the CAD design, followed by prototyping and completed with test drives and hot climate tests in the United Arab Emirates, the result is awesome.
500 hp and 480 Nm of torque, achieved through gentle soft charging with just 0,3 bar (relative) boost, let the BMW M3 appear completely changed. Already from 3.000 rpm on the supercharged G-POWER M3 TORNADO pulls like the standard BMW M3 revving twice as much, but than the G-POWER M3 TORNADO really starts to flex its muscles: from 5.000 rpm on until redline the G-POWER M3 TORNADO provides constantly about 20 % more torque than the factory car, this provides an acceleration that feels like being dragged by a bungee cord.  This output explosion is based on the heart of the G-POWER supercharger system, the all new T1-518 ASA centrifugal supercharger. By the way the ASA superchargers are being used in the ALPINA models B5S, B6S and B7 as well, just like the ALPINA B6 GT3 race car, in witch the chargers could state there impressive quality and reliability during 3.500 km in the “Green Hell” of the Nürburgring at the 24th hour race on may 23rd and 24th! The exclusive use of components meeting OEM standards is one of the basic elements of the G-POWER philosophy and one of the secrets for the extraordinary quality, reliability and performance of the G-POWER products.
For its mission in the G-POWER M3 TORNADO the ASA T1-518 has been literally been tailor-made, to provide the giant need for fresh air of the up to 8.300 rpm revving 4.0 litre V8 engine. But the ASA supercharger, flanged to the engine using a CNC-milled high-strength mount, is not the only high-tech component of the G-POWER M3 supercharger system. The engineers did not spare any cost or efforts during the development of this supercharger system. Amongst others they even did a sophisticated, computer aided simulation which analyses the conditions of the
air-ducting engine parts.
The defined goal of this extensive research is to improve the efficiency of the G-POWER supercharger system to the best possible performance.  And the result proofs us right. The G-POWER supercharger system is capable of reducing the specific fuel consumption of the engine. This shows that we do not only care about performance but are concerned of the sensitive use of restricted resources like fuel, as well.  
A further key figure, next to the supercharger, in the G-POWER supercharger system is the complete aluminium cast, large volume air box, including 8 lightweight integral resonance induction pipes, that is responsible for the perfect throttle response and optimal torque curve.
The G-POWER M3 supercharger system is completed by the large air-to-air intercooler that is located in the vehicles front, which cools the boost temperature down to an output optimal level under all circumstances.
Of course the performance figures benefit from this huge output improvement. The figure from stand still to 200 km/h improves from 15,8 seconds (stock, 6-speed manual) to 13,5 seconds (SKI). On demand we can enable an unlimited top speed according to the capacity of the tyres.
In combination with the 20 inch G-POWER SILVERSTONE DIAMOND wheels and the MICHELIN Pilot Sport tyres in the dimension 255/30 ZR 20 and 295/25 ZR 20, a top speed of more than 320 km/h can be achieved. Especially designed for the BMW models, the G-POWER SILVERSTONE Alloy Wheel forms a contrast to the great mass of other aftermarket wheels, due to the successful combination of double spokes and the "concave design" typical of G-POWER. The G-POWER “diamond cut” provides for the fascinating dynamic appearance of the G-POWER SILVESTONE rim, in contrast to the silver-graphite coated rim body and the bolt applications of stainless steel. An additional feature of the G-POWER SILVERSTONE rim is its weight-optimised design that allows a low rim weight with the same stability, compared to other standard wheels. A perceptibly improved impression of convenience and a considerably increased agility accompany the minimisation of the unsprung mass: advantages of the G-POWER SILVERSTONE rim, which you can factually experience above all in connection with low-profile tyres. Further improvement of the road handling is realized through the continuously height-adjustable G-POWER coil-over suspension G3M-RS with nine selectable settings each for bound and rebound.
Next to the output and the suspension of the BMW M3, G-POWER has taken care of the sound, as well. The G-POWER 4-trim sport rear muffler with its 4 x 83 mm tailpipes gives the BMW V8 a deep, throaty sound that turns heads but is at now time annoying. The G-POWER M3 rear muffler is available made from stainless steel or completely out of Titanium which is 14,5 kg lighter than the factory part.
The interior is upgraded by G-POWER with precious carbon panels, a speedometer with G-POWER logo scaled to 360 km/h, a sporty aluminium pedal set and on demand a tailor-made leather interior. The exclusivity of each G-POWER M3 TORNAD is documented with a special badge in the interior and on the supercharger system that features the G-POWER serial number.
The G-POWER M3 TORNADO supercharger system with 500 hp is starting from 8.350,00 Euro plus installation at G-POWER in Autenzell, the price for the 20 inch G-POWER SILVERSTONE wheel set with MICHELIN tyres is 4.474,66 Euro and the G-POWER titanium rear muffler is 2.504,200 Euro.

Source: G-Power