Autoblog spy photographers have snapped a few shots of the upcoming Mercedes-Benz G55 AMG and G65 AMG SUVs. The beasts are currently undergoing winter testing in Sweden, and from the looks of things, buyers will be able to chose between two brawny boxes when the vehicles receive an official debut next year. The G55 is likely to feature a 525 horsepower, twin-turbocharged 5.4-liter V8 engine along with the subtle grille and bumper updates we see here. The globe-crushing SUV will also likely receive larger, more capable brakes as well as an updated interior. Otherwise, we can expect the G’s sharp angles to soldier on in perpetuity.

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If the G55 isn’t enough to make you giggle, Mercedes-Benz is also planning an even more exclusive G65. That terror will come boasting a 6.0-liter, twin-turbo V12 engine good for 612 horsepower and 737 pound-feet of torque, though only 200 units will be produced. How’s that for maniacal? Word has it the AMG G twins will take a bow at either the 2012 Detroit Auto Show or the 2012 Geneva Motor Show in March.