egmCarTech

The Mercedes McLaren SLR is supposedly to be upgraded later this year. The updates will have a supercharged V8 engine that will push the 650 horsepower. The current McLaren SLR pushes 626 horsepower. Other upgrades to the Mercedes McLaren SLR will include 19-inch wheels, a new braking system, a firmer suspension and a new interior. This is a photo of the new McLaren SLR prototype that was spotted in moutains of Spain.

Source: Sybarites

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