* Exterior
Custom carbon-fiber body panels

* Interior
Brabham Racing custom leather/Alcantara, sport seats

* Performance
Peak Power: 494 hp @ 8300 rpm
Peak Torque: 354 lb-ft @ 5700 rpm
0-60 mph: 4.1 sec.
Top Speed: 189 mph

BT 71
This should be relatively brief. Though I admire certain aesthetic explorations on the X6, I think it's one of the least responsible designs of our times. Sales were fine apparently while the economy was floating atop that bubble. Starting in late September 2008 X6 sales dropped like an X6 dumped off a bridge.

Regardless of my soapboxing, though, the X6 is a stunning bit of raw material for tuners to doll up and I really love this "Russian oligarch" trim design. Those black one-piece forged monsters are of the 10.5x22-inch variety and if you don't look too closely they are beautiful. Sitting still and up close they're chunky work. The low profile of the 295/30ZR22 Dunlop Sport Maxx tire set lends itself to the mass of the BT 71 and this is the one of the three cars that looks best in the Brabham blue paint that changes its hue with every passing change in light.

Power and torque change only a bit here as no "O.N." transformation has been done to the twin-turbo N63B44 4,389cc V8. With 434 hp now up between 6200 and 6400 rpm, and 479 lb-ft of torque peaking slightly between 3200 and 3400 rpm, top-end performance changes imperceptibly, but mid-range throttle response in all six gears of the Steptronic automatic has improved nicely. This politically incorrect hunk is perfect for overtaking and oppressing slower traffic. It's still not as good as the twin-turbo xDrive35d, which renders the X6 practically acceptable.

Power and torque come from finer breathing capacity from the high-flow performance air filter, better intake and exhaust flow, and modified intercooling using the stock units as base material. Aside from these periphery tweaks, we have the larger Brabham Racing brake assemblies for better stopping of this dense machine and the mandatory (in this case subtle) ECU remapping.

Estimated price for the BT 71 falls around $125,000 by today's exchange rates. By the by, the basic product strategy for Brabham Racing is, according to Trick, to make a BT version of every M and X model in the BMW lineup.

Brabham Racing BT 71
* Layout
Longitudinal front engine, all-wheel drive

* Engine
5.0-liter V8, dohc, 32-valve, turbocharged. Modified ECU, augmented intakes, larger intercoolers, free-flow air filter by Brabham Racing

* Transmission
Six-speed Steptronic automatic

* Suspension
Strut-type BMW front, multilink rear, anti-roll bars

* Brakes
Eight-piston aluminum fixed calipers, 420mm cross-drilled and internally vented rotors (f), six-piston calipers, 380mm rotors (r)

* Wheels and Tires
One-piece forged alloys, 10.5x22Dunlop Sport Maxx, 295/30

* Performance
Peak Power: 434 hp @ 6200 rpm
Peak Torque: 479 lb-ft @ 3200 rpm
0-60 mph: 5.3 sec.
Top Speed: 155 mph

Brabham Racing
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