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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.

Video: Hennessey Venom GT now unofficial fastest production car

The Hennessey Venom GT hit its top speed of 270.49 mph last week at the Kennedy Space Center, edging out the Bugatti Veyron Super Sport's previous 269.86 mph record. Hennessey and Bugatti have been battling for the top spot of "fastest production car in the world," and this time America came out on top. Hennessey attempted a record run in 2013, reaching a top speed of 265.7 mph before running out of room on the 2.9-mile-long runway at the Naval Air Station in California.

Pebble Beach and Monterey car week 2013 preview: in pictures

Every August, car nuts from around the globe congregate on the Monterey Peninsula, on the west coast of America, to pay homage to the internal combustion engine. A series of events is run, culminating in the most prestigious concours in the world – Pebble Beach. Over the next few days we’ll be bringing you coverage of the key events and some of the smaller ones too, all leading up the grand finale.