The tuners from MR Car Design, with their headquarters in Erftstadt, Germany have mildly upgraded the Maserati Quattroporte, offering a bit more power and a series of new components for the Italian luxury saloon, that has been on the market since 2003.
Visual enhancements are resumed to tinted windows plus a new set of 22 inch rims from Vossen which use 15 mm spacers on the rear axles and are equipped with high performance tires, size 245/30R22 at the front and 295/25R22 at the rear. In connection with the new H&R set of springs which lower the ride high by 20 to 30 mm, the Maserati Quattroporte is expected to handle better, while the dynamic pressure-optimized stainless steel exhaust system featuring 76 mm in diameter tailpipes enables the car to sound more aggressive.
In terms of engine performance, MR Car Design has tweaked the software and enabled the Maserati Quattroporte to produce an additional 30 HP. Total output was this way brought to 430 HP and 480 Nm of torque. 

Source: MR Car Design