The Mercedes Benz S-Class has always been one of the most luxurious production cars available on the road today. With a Twin Turbo V-12 under the hood we turned to RENNtech's R1 Performance Package to take the (W221) motor from 510 HP/612 LB-FT to a whopping 635 HP/780 LB-FT. The R1 Package consists of a RENNtech ECU Upgrade, TCU Upgrade, and a High Efficiency Intercooler Pump. To put the power to the ground we added a set of lightweight forged ADV1 wheels. 21 inch ADV 5.0M.V2 wheels with hidden hardware, silver barrels, and a silver finish. To fit the bill we squeezed on a set of Pirelli tires and sent her on her way. See more about this vehicle here: https://www.gmpperformance.com/index...2#!prettyPhoto