All right, we call this an Akrapovic McLaren 650S because that bespoke exhaust system is like the biggest highlight of this bad boy. In truth though, it’s an MSO 650S tuned by the owner with EVOMS engine treatment and, of course, the Akrapovic exhaust.

Here we see the Akrapovic McLaren 650S do a couple of launch control starts at 2015 Shift-S3ctor California Airstrip Attack, flaunting its power and lovely exhaust noise. Oh, and the driver is the owner’s 12-year old son!

Although we do not have the official specs on this Akrapovic McLaren 650S, we can go ahead and have an educated guess as to the kind of power it produces. The standard 650S comes with 650 horsepower. The engine software upgrade could, at the very least, add 20 to that. One can also attribute the addition of 15 to 20 horses to the use of the custom exhaust system. So something in the neighborhood of 690 PS would be the amount of oomph delivered to the rear wheels of this unique McLaren.

Video by BrianZuk