XYZ Racing Street Advanced Coilovers — Infiniti Q45 (Y33) welding 1997-2001

The Y33-generation Q45 carries close to two tonnes over a long-wheelbase, rear-drive platform, and the factory hydraulic suspension was tuned for isolation, not feedback. That softness shows up as body roll under load and a front end that dives hard under braking – exactly the traits an enthusiast owner notices once they start pushing the car on a B-road or a track day. XYZ Racing’s Street Advanced coilover for the Infiniti Q45 replaces that setup with a coilover kit built for this specific chassis.

Street Advanced sits between the entry-level street kits and the full track ranges in the XYZ Racing line-up, aimed at drivers who want a car that stays composed on a spirited drive but is still comfortable enough to use every day. On the Q45’s WELDING-spec Y33 platform, that means a kit engineered to work with the car’s mass rather than fight it, with damping you can adjust as your use of the car changes.

What this coilover does for your 1997-2001 Infiniti Q45

Fit this kit to a 1997-2001 Q45 and the first thing you’ll feel is body control – less pitch under braking, less roll turning into a corner, because the big saloon’s weight is now being managed by dampers matched to the car rather than a soft factory tune. The 720-way damping adjustment means you can wind the compression and rebound up for a firmer, flatter ride when you’re driving with intent, then back off for motorway comfort without swapping parts. Lowering the ride height also drops the Q45’s centre of gravity, which works directly against the pitch and roll the standard suspension allowed. For a car this heavy, that adjustability matters more than outright spring rate – you’re tuning how the mass moves, not just how stiff the car feels.

About the Street Advanced coilover

Street Advanced is one of XYZ Racing’s longest-running and most-fitted coilover ranges, refined over years of development by the XYZ engineering team and proven through use in motorsport events run by teams worldwide. That racing background feeds directly into the road product: the kit is built for daily road use and track day duty alike, rather than being a track-only setup that’s been softened for the street. Its headline feature is 720 individual damping settings, giving a genuinely fine window between plush and firm rather than a handful of coarse steps. For an owner who wants to move between commuting and a quick drive on a closed circuit without changing hardware, this is the range built to do both.

Fitment for the Infiniti Q45 (1997-2001)

This kit is specified for the Y33-generation Infiniti Q45, covering the 1997 to 2001 model years, in the WELDING application – meaning the top mount is a weld-in design rather than a bolt-in top hat, so fitment should be carried out by an installer comfortable with that process. Confirm your Q45 sits within the Y33 chassis code and 1997-2001 build window before ordering, as coilover geometry is matched to this specific generation.

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Ready to sort the Y33’s body control for good – pick your spec below and build yours to suit how you actually drive the car.