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Suburban Terror: Hennessey offers upgrade packages for GMC SUVs

Lest you think that Hennessey Performance Engineering will only tune up your Dodge Viper or Cadillac CTS-V, feast your eyes on this little number showing one of the company's souped-up SUVs taking on a 2011 Nissan GT-R. It's really an unfair fight: The Cadillac Escalade sports a 6.2-liter V8 which in stock form makes about 400 hp. But Hennessey, not looking for a beatdown, drops a twin-turbocharged 427 cubic-inch LSX engine with high-flow cylinder heads, intake and exhaust upgrades, a performance camshaft and a laundry list of other parts to bring the truck's output to 1,000 hp.

The best concepts from the Tokyo Motor Show 2013

Japan is a land famous for its futuristic gadgets, so naturally the Tokyo Motor Show is packed full of exciting and innovative concept cars. But in 2013 many of them are actually not that far from going into production. Though that doesn’t mean there aren’t a few crazy ones as well.

New high-performance BMW X5 M50d diesel in pictures

BMW has released pictures and details of the new X5 M50d, a 381hp super-diesel SUV with the world’s most powerful straight-six diesel engine. It will join the new, third-generation X5 range, which is set to go on sale in the UK this November with prices starting at £42,590. The engine carries over from the previous X5 M50d, but the 2013 version is both quicker and more fuel-efficient.