German tuner Wheelsandmore has a complete package for current Maserati lineup including the Quattroporte and GranTurismo. This program includes upgrades for ECU, suspension, brakes, wheels and exhaust system but it does not effect the looks of the car, which is fine because these Masers are awesome as standard and you wouldn’t want to change a thing!
They offers a set of stainless steel rear silencers with valve flaps for Maserati Quattroporte and Gran Turismo which adds around 20 hp, and also comes with a remote control that lets you choose between race, cruise, and sports noise.
They also offer an ECU upgrade for the (294kW) 400 hp / 460 lb-ft V8 engine which increases the power to (313kW) 425 hp / 485 lb-ft, and the top speed to 179 mph. To cope with the extra power, Wheelsandmore offers a professional brake kit with 14.96×1.34 inch / 8-piston calipers at front and rear discs 14.2×1.26 inch / 6-piston calipers.
As for the suspension, you get the special coil over, height and compression adjustable kit which can be tuned to your desired specs. Then there’s the wheels, and you can either go for the 20-inch Carbon wheels or the normal forged lightweight alloys. They can also paint the wheels in any color you want. You can also choose between Dunlop Sport Maxx or Pirelli tires.