XYZ Racing Racing Spec Coilovers — Infiniti QX70 (S51) 4WD 2013-2017

The S51 QX70 is an unusual starting point for a serious circuit build – a two-tonne 4WD SUV riding on a chassis shared with the FX series, carrying a high centre of gravity and a permanent torque-split that wants to push wide the moment you load the front axle. The XYZ Racing Racing Spec coilover exists for owners who have already accepted that and want to do something about it.

This is the top of the XYZ ladder, developed against data gathered at WTCC-level competition and aimed at serious track and time-attack use. On a QX70 (S51) 4WD running between 2013 and 2017, that means resetting the ride height, killing the body roll that comes baked into the factory tune, and giving the front tyres a fighting chance under sustained load.

What this coilover does for your 2013-2017 Infiniti QX70

Drop the nose, tighten the rebound, and the S51 stops behaving like a road-biased crossover and starts behaving like something you can actually thread through a corner. Turn-in sharpens because the front tyres are no longer being asked to fight a soft factory spring through 50mm of unnecessary travel. Mid-corner the chassis settles instead of leaning – critical on a vehicle this tall, where the standard dampers run out of control long before the tyres do. Under hard braking into a slow corner, the nose stays composed rather than diving onto the bump stops, which keeps the 4WD system loading the rear axle the way it was designed to. Spring rates and damping curves are picked for circuit work, so expect a stiffer ride on broken UK B-roads – this is a coilover for owners who have decided what the car is for.

About the Racing Spec coilover

Racing Spec is the kit XYZ point owners at when they tell them they are running wheel-to-wheel or chasing lap times rather than fast-road comfort. The damping settings come directly from XYZ’s own racing programme, including WTCC participation, so the baseline tune already reflects what works on a circuit rather than what works in a showroom. The unusual part is the custom-build pathway: XYZ will spec bespoke shock absorbers around an individual car if it is running aggressive upgrades, factory-style racing parts, or A-class race components, and they ask the owner to supply the modification list and the circuit it will be driven on. For a QX70 build that has already moved past brake pads and tyres, that consultation route is more useful than any off-the-shelf range. Construction and adjustment hardware are XYZ’s circuit-grade pieces, intended to survive repeat heat cycles rather than ten weekends a year of dry-track use.

Fitment for the Infiniti QX70 (2013-2017)

This kit is built for the S51 chassis QX70 in 4WD form across the 2013 to 2017 production run. Confirm your chassis code reads S51 before ordering, and note that this is the 4WD variant specifically – drivetrain layout affects the spring and damping spec.

What buyers also search for

• Infiniti QX70 S51 coilover upgrade for track and time-attack use
• QX70 4WD suspension that holds up to sustained circuit loads
• Racing-spec damping for the 2013-2017 Infiniti QX70
• S51 chassis ride-height and roll control for serious track days
• Custom-spec coilover options for heavily modified QX70 builds

This is a serious-intent coilover for a serious-intent QX70 build – pick your ride-height and damping spec in the configurator below.