The proud parents at BMW just can't stop adding new runts to the litter. The latest, which looks to be a rather large runt, is what could be a BMW X5 M. Spotted on a car hauler somewhere in the Fatherland, the modified X sports quad pipes that don't emerge from their usual slots, but are spaced further apart than the usual M arrangement. It's also got a note inside informing drivers not to let the engine run for more than thirty minutes, which could have something to do with the blacked-out camo job covering the front spoiler.

Some folks bet it will be powered by the 5.0-liter V10 from the M's 5 and 6. BMW has said, though, that that engine is reserved exclusively for those two cars. If not that, then it could be a twin-turbo V8 with 430 HP. That would be a 70 HP jump over the normally aspirated 4.8-liter V8, slotting the X5 M between the Cayenne S and Cayenne Turbo, and putting it 80 HP down on the Mercedes ML 63. Frankly, we don't think that sounds very M, nor anything like The Ultimate SUV. Stay tuned.

[Source: Motor Authority]