The Mercedes AMG 63 V8 engine is the world’s most powerful naturally aspirated engine – well it was before Aston Martin One-77 came along – but a tuner been thinking what if we supercharge it?! So they did, and arrived at great results. As seen in this video of the engine having a dyno test, the power’s gone up to 662 hp and the torque to 808 Nm. This kit made by Xtra Power can be fitted to all the car’s powered by the 63 engine. Check it out on a E63 in this video, but before you click play protect your ears!