Maserati Quattroporte (M139) 2003-2012 - Muller 1-Way Series Coilovers Spring Upgrade:Swift Springs or HyperCo Substitute but will still notice a

but will still notice a great improvement

Disassembly and inspection of coilovers

The Fortune Auto Suspension Signal Canceller is designed and machined in the USA at the Fortune Auto facility

Swift and HyperCo Springs are not available due to the design of the rear spring

Our engineers have combined the advantages of race spec camber plates and spherical bearings with a bearing similar to those of an OEM that isolates spring movement from the rest of the coilover assembly

Maserati Quattroporte (M139) 2003-2012 - Muller 1-Way Series Coilovers Spring Upgrade:Swift Springs or HyperCo Substitute but will still notice aCUSTOM. MODULAR. REBUILDABLE. In conjunction with Fortune Auto engineers and Muller Suspension specialists. All Muller Suspension systems are designed with maximum performance and ride quality in mind. Muller suspension systems are truly bespoke in utilizing industry lading machining methods and materials. Designed for High line Vehicles and Exotic Supercars. Amsoil Synthetic Shock Oil Flow Digressive Piston Technology Swift Springs standard on most