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We bet there are still thousands of BMW M fans out there reeling from the fact that the performance division is launch its first ever SUV model, and a turbocharged one at that. Those fans better get used to it fast as BMW has just revealed its new X5 M and X6 M SUVs ahead of their New York Auto Show debut.

The latest images reveal more aggressive overall styling and slightly lower stance for the performance pair, though there remains a healthy amount of wheel-arch gap. The hood, front air dam, and headlights are virtually identical on the BMW X5 M and X6 M.

Unique 20in split five-spoke wheels, absolutely enormous brake discs that could pull double duty as pizza pans and a sporty rear diffuser/exhaust area add to the M-specific appeal. Inside, a two-tone leather treatment with M branding complete the first-ever M-SUVs.

The new M engine is the world's first with a pulse-tuned exhaust manifold encompassing both rows of cylinders
Enlarge PhotoBoth models are powered by a newly-developed 4.4L V8 M engine delivering 555hp (412kW) at 6,000rpm and 500lb-ft (677Nm) of torque from a low 1,500 to 5,650rpm - enough to send the vehicles from 0-60mph in just 4.5 seconds.

This new M engine is the world's first with a pulse-tuned exhaust manifold encompassing both rows of cylinders combined with high-performance twin-scroll twin turbo technology. Two low-mass twin-scroll turbochargers are positioned together with the catalytic converters in the "V" section between the two banks of cylinders. By reversing the flow of gases through the engine from traditional arrangements, the intake and exhaust ducts are shortened and widened. The result is that pressure losses on the exhaust side are minimized.

This configuration, known as Cylinder-bank Comprehensive Manifold (CCM), offers quick turbo spooling, a linear build-up of engine power, and a broad, consistent torque curve by feeding each of the twin turbochargers with a "charge pulse" at approximately every 90 degrees of crankshaft rotation, rather than the more traditional "irregular schedule" of charging. Maximum boost pressure is set at 1.5bar (21psi).

BMW M engineers have also reworked the full drivetrain and chassis, adding new M-specific adaptive suspension, an uprated intelligent xDrive AWD system, and newly-developed Servotronic power steering.

Also featured for the first time on an M model is a six-speed automatic transmission, which for the X5 M and X6 M also comes with an electronic selector on the center console and offers three different driving modes – Drive, Sport and M Manual modes for absolute control of gear selection

BMW WILL treat its polarising X6 “sports activity vehicle” to a new performance-oriented hybrid powertrain before the end of 2009, gifting the big BMW with both startling acceleration and respectable fuel economy.

Plans for a petrol-electric X6 have long been in the offing. Now, with the vehicle’s late-2009 launch date nearing, technical details have begun to surface.

The ActiveHybrid X6 will be powered by the same twin-turbocharged 4.4 litre V8 from the X6 xDrive50i, except with two 67kW electric assistance motors hooked up to the seven-speed gearbox and standard xDrive AWD system.

The motors and their attendant nickel-metal-hydride batteries add roughly 200kg to the X6’s kerb weight, however the extra grunt they provide is expected to propel the 2.5-tonne SUV to 100km/h in around 5.6 seconds. Top speed? A heady 250km/h.

It’s not all about speed though: the ActiveHybrid X6 will be able to move under electric power only for up to three kilometres, meaning negotiating congested city centres should be able to be done without firing up the X6’s monstrous V8.

Fuel consumption is expected to be around the 10.0 l/100km mark on the combined cycle.

The X6 hybrid’s petrol-electric technology will soon be transplanted into the 7 Series limousine, however the chances of either model coming here are pretty slim.

BMW Australia told TMR in May that no ActiveHybrid models are planned for the Australian market, and that BMW intends to manufacture its hybrids in LHD only.

As BMW’s application of hybrid tech extends across the rest of its range, we may eventually receive our own RHD models. At this stage though, don’t bank on seeing an X6 hybrid at your local BMW dealer.