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

The M139 Quattroporte was Pininfarina-styled, Ferrari-engined, and saddled with Skyhook adaptive dampers that were brilliant when new and a small fortune to repair when the solenoids gave up. That is why this kit exists. The XYZ Racing Street Advanced coilover for the Maserati Quattroporte M139 is built specifically as a cancellation solution for cars whose electronic damping has either failed, been condemned by a workshop, or been priced out of economic repair.

Strip the Skyhook hardware, fit a passive Street Advanced corner at each wheel, and you get a Quattroporte that drives like a properly sorted GT saloon again – one you can actually live with on UK B-roads without warning lights on the dash or four-figure Maserati specialist invoices on the kitchen table.

What this coilover does for your 2003-2012 Maserati Quattroporte

The 1,930kg M139 carries its mass with a long wheelbase and a front-mid V8, which means the chassis rewards damping that controls vertical movement without crashing over expansion joints. Street Advanced is exactly that brief: 30-way adjustable damping lets you set a softer compression bias for daily driving, then firm things up for a faster cross-country run. Ride height is wound in independently of damper stroke, so you can drop the nose to close the wheel-arch gap without sacrificing travel – critical on a car this heavy. Spring rates are matched to the Quattroporte’s weight distribution rather than carried over from a generic application, which keeps the rear axle planted under throttle from the 4.2 V8.

About the Street Advanced coilover

Street Advanced is XYZ Racing’s fast-road platform, sitting between the entry Super Sport and the circuit-focused Racing Spec. The damper bodies are monotube construction with a low-friction seal package, which keeps response honest as oil temperatures climb on a long motorway run. Damping is adjusted via a single 30-click knob at the top of each unit, combining bump and rebound on one curve tuned for road use. Pillowball top mounts are fitted at the front for sharper turn-in response, with rubber-isolated mounts at the rear to keep cabin noise down. Powder-coated bodies and zinc-plated hardware are specified to survive UK winters, and the springs are linear-rate to give predictable behaviour as load builds through a corner.

Fitment for the Maserati Quattroporte (2003-2012)

This kit is specific to the M139 chassis Quattroporte produced from 2003 to 2012, covering both the original 4.2 and the later 4.7 Sport GT S. It is supplied as a cancellation kit for cars originally fitted with the Skyhook electronic damping system – the existing electronic struts and rear units are removed entirely and replaced with passive XYZ corners.

What buyers also search for

• Maserati Quattroporte Skyhook delete kit for failed electronic dampers
• M139 Quattroporte coilover conversion to passive suspension
• 4.2 and 4.7 Quattroporte fast-road suspension upgrade
• Maserati Quattroporte ride height adjustment without electronic struts
• M139 suspension repair alternative when Skyhook units fail

Confirm your build year and that your car is the Skyhook-equipped variant, then configure your Street Advanced kit below.