XYZ Racing Top Sport Coilovers — Maserati Quattroporte M139 (Cancellation Kit for Electronic Damping) 2003-2012

The M139 Quattroporte was built around Skyhook adaptive damping, and when those electronic struts fail the bill from Modena is enough to make owners scrap otherwise sound cars. This XYZ Racing Top Sport coilover for the Maserati Quattroporte M139 is the cancellation-kit route out of that corner – a full mechanical replacement with the bypass loom needed to silence the dashboard warning and retire the OE adaptive system entirely.

It also turns the big saloon into the car a lot of M139 owners actually wanted in the first place. The factory air-and-Skyhook setup floated the 1.9-tonne kerbweight beautifully on smooth motorway, but went vague the moment you asked the front axle to commit. The Top Sport spec brings real damper authority back to the chassis without turning a luxury four-door into a track car.

What this coilover does for your 2003-2012 Maserati Quattroporte M139 (Cancellation Kit for Electronic Damping)

The 30-way bump and rebound adjustment lets you settle the long 3,064 mm wheelbase under braking into a roundabout, then back the damping off again for B-road compression. Pillowball top mounts replace the rubber OE bushings, so steering inputs land at the front wheels rather than getting absorbed by the strut tower. Ride height is independently adjustable from spring perch, meaning you can drop the nose to close up the arch gap on 19-inch OE wheels without losing usable suspension travel. And because the kit ships with the electronic-damping cancellation loom, there is no permanent dash light, no limp-mode fault and no need to keep a working Skyhook ECU in the car.

About the Top Sport coilover

Top Sport is XYZ’s fast-road and light-track spec. Construction is a 52 mm monotube damper running in an inverted configuration at the front strut, with hardened piston rods and full-length adjustable lower mounts machined from billet. Each damper carries 30 clicks of combined bump and rebound on a single knob, which keeps roadside fettling simple. Spring rates are matched to chassis weight and bias rather than picked from a generic range, and the kit includes pillowball upper mounts on the front and rubber-isolated mounts on the rear to keep cabin noise tolerable on long journeys. Coatings are nickel-plated to resist the road salt that kills cheaper budget coilovers within two UK winters.

Fitment for the Maserati Quattroporte M139 (2003-2012)

This kit is built specifically for the M139-chassis Quattroporte across the full 2003 to 2012 production run, covering the original 4.2 V8 cars and the later 4.7 GTS and Sport GT S variants. The cancellation kit is included because every M139 in this period left the factory with Skyhook adaptive damping as standard.

What buyers also search for

• Maserati Quattroporte Skyhook delete coilover for owners who want to retire the failing OE adaptive system permanently.
• M139 Quattroporte suspension upgrade that handles UK B-road compressions without floating the rear axle.
• Maserati Quattroporte coilover with cancellation loom included, so the dashboard warning stays off after install.
• 4.2 and 4.7 Quattroporte ride-height adjustment for closing the arch gap on factory 19-inch wheels.
• Quattroporte M139 fast-road damping setup that survives more than two UK winters of road salt.

Pick your spring rate and damping spec below and build the kit to suit how you actually drive the car.