The following upgrade kit from Wheelsandmore has taken the facelift version Mercedes SL65 AMG to the next level both in terms of performance as well as looks.
By revising the engine electronics and fitting the German roadster with a high flow exhaust system, the tuner enabled the Wheelsandmore Mercedes SL65 AMG to output 697 HP and 1150 Nm of torque, instead of 612 HP and 1000 Nm like the regular version.
In terms of appearance the Wheelsandmore Mercedes SL65 AMG has been enhanced by receiving a set of 20 inch, custom design alloys wrapped in High performance Dunlop tires as well as an electronic lowering module that alloys individual lowering setup.
Pricing for the Wheelsandmore Mercedes SL65 AMG conversion was not announced. 
Wheelsandmore press release :
Even if the topversion of the SL65AMG Mercedes Benz is strong enough for most people, wheelsandmore from germany developed a performance package to put the roadster up to the next level.
Wheelsandmore increases the power eliminates serial speed limiter of the biturbo engine from serial 612hp and 1000 Nm of torque up to 697 hp and 1150 Nm by upgrading the electronic control unit and within a special exhaustsystem.
All handmade exhaustsystems from wheelsandmore are coming with remotable valve flaps. In actual case they finished the endtips in serial AMG look on customers request.
Additional performance delivers their 3-piece forged wheelmodel 6Sporz, sizing 10,0×20” at the front and 12,0×20 at the rear axle. The lightweight rims are equipped with high performance tyres from Dunlop, sizing 255/30/20 front and 305/25/20 rear.
The best optical and performance suspension solution is presented by wheelsandmore´s electronic lowering module “LowMaXX”. It allows an individual lowering setup by maintaining serial settings and lifts up the car around 45mph to save comfort and safety.

Source: Wheelsandmore