We reckon the 2014 Mercedes-Benz S63 AMG is the ultimate sedan. It's big, luxurious and, thanks to a 585-hp 5.5-liter twin-turbo V8 underhood, lightning fast. Canadian tuner SR Auto Group has been waiting patiently for one to arrive at its work shop, and when the opportunity came, the aftermarket firm wasted no time adding a set of stunning 21-inch PUR 1NE alloys finished in Lumiere Gray. A Basics lowering system was then added to eliminate any wheel gap.