XYZ Racing Street Advanced Coilovers — Infiniti Q45 (G50) Front top mount: 116mm / Front lower mount: φ20 1989-1997

The G50 Q45’s air-suspension option was one of the first on a Japanese flagship, and plenty of survivors in 2026 are running on tired, unsupported dampers well past their working life. The XYZ Racing Street Advanced coilover replaces that setup with a conventional, serviceable strut and spring combination sized for this specific front mounting geometry – 116mm top mount, φ20 lower – so the big VH45DE-engined saloon stops wallowing under its own kerb weight.

Street Advanced is built for exactly this brief: a heavy, comfort-biased road car that still gets driven with intent. It is not a stripped-out track special, and it does not need to be for a Q45 owner who wants sharper body control on the school run and something more composed when the road opens up.

What this coilover does for your 1989-1997 Infiniti Q45

A 1989-1997 Q45 carries a lot of mass over the front axle, and factory-soft damping lets that weight roll forward under braking and outward mid-corner. The Street Advanced kit’s 720-way damping adjustment lets you firm up compression and rebound in small enough increments to control that pitch without turning the ride harsh – useful on a car that was tuned from the factory for isolation, not feedback. Lowering the ride height also drops the centre of gravity, which cuts into the nose-heavy understeer this platform is known for, and tightens up the vague turn-in that stock Q45 suspension is notorious for after 30-plus years. Because the damping range is this wide, you can run one setting for motorway cruising and a firmer one for a spirited back-road drive without swapping parts.

About the Street Advanced coilover

XYZ Racing developed Street Advanced over several years specifically as the volume product in its range, refined using feedback from the same engineering group that services XYZ’s race programme. The core spec is 720 damping adjustment increments, giving fine control over compression and rebound rather than the handful of clicks typical of a basic sport kit. It is aimed squarely at drivers who want their daily car to handle better without accepting a stiff, track-focused ride every time they start the engine – road use and the occasional track day both sit inside its design brief. The construction carries over the durability testing XYZ applies across its coilover line, so the kit is built to hold its adjustment range over years of use, not just out of the box.

Fitment for the Infiniti Q45 (G50) (1989-1997)

This kit is specified for the G50-chassis Q45 built between 1989 and 1997, matched to a front top mount of 116mm and a front lower mount diameter of φ20. Confirm these two front mounting dimensions against your car before ordering, as G50-era Q45s were sold with more than one front suspension configuration across the model run.

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Pick your damping and spring spec for the G50 Q45 and configure yours below.