XYZ Racing Super Sport Coilovers — Maserati Quattroporte M139 2003-2012

The M139 Quattroporte is a heavy front-engined saloon with a 4.2 or 4.7 V8 sitting well behind the front axle line, and that mass tells you everything you need to know about why the factory air and passive setups end up tired, leaky and floaty by the second decade. On these cars the body never quite settles after a mid-corner crest, and turn-in softens long before the Brembos start to complain. A properly specified XYZ Racing coilover gives you back the chassis the M139 was designed around.

This is the Super Sport range built for fast-road Maserati Quattroporte ownership: a saloon you still want to use across a B-road, into town, and onto a fast motorway slip without it feeling like a circuit refugee. Damping and spring rates are pitched to flatter the M139’s GT brief rather than punish it.

What this coilover does for your 2003-2012 Maserati Quattroporte

Body control is the headline. The Super Sport’s 30-way damping adjuster lets you firm up rebound enough to stop the front nose-diving under hard braking from speed, while the soft end of the range keeps the car compliant over patchy UK A-road surfaces. Ride height is independently adjustable from the lower bracket, so you can drop the Quattroporte’s stance without preloading the spring or shortening usable shock stroke – important on a 1,900 kg saloon. The pillow-ball top mounts sharpen turn-in response so the nose feels connected to the steering rack rather than rolling onto its outer shoulder. End result: a Quattroporte that holds a chosen line, brakes flat and stops bobbing on the motorway.

About the Super Sport coilover

The Super Sport is a full-coilover replacement built on a monotube damper body with separate ride-height and spring-preload adjustment – the right architecture for a heavy luxury saloon where you do not want to sacrifice damper stroke just to sit the car lower. Damping is adjusted through a single 30-step click dial that moves rebound and compression together, which keeps real-world setup simple for owners who do not want to think in two-way damper language. Pillow-ball upper mounts replace the rubber-bushed factory tops to remove deflection under load. Spring rates are matched to the Quattroporte’s nose-heavy weight distribution and aimed at fast-road use rather than circuit lap times. Hardware is built around serviceable, rebuildable internals – this is a coilover designed to be owned, not thrown away.

Fitment for the Maserati Quattroporte (2003-2012)

Designed for the M139-chassis Quattroporte across the full 2003-2012 production run, covering both the 4.2 and the later 4.7 V8 saloon variants. The kit replaces the factory front struts and rear shock-and-spring assemblies and is sold as a complete four-corner set.

What buyers also search for

• Maserati Quattroporte M139 suspension upgrade for fast-road use
• M139 Quattroporte coilover conversion replacing tired factory dampers
• Height-adjustable coilovers for the 4.2 and 4.7 V8 Quattroporte
• Maserati Quattroporte ride-height drop without losing damper stroke
• 30-way adjustable Quattroporte coilovers for GT saloon driving

Pick your spring rates, damping preference and ride height from the configurator below to build the Super Sport kit to your Quattroporte’s spec.