XYZ Racing Tarmac Rally Coilovers — Infiniti Q45 (Y33) welding 1997-2001

The Y33 Q45’s long wheelbase and nose-heavy V8 layout are exactly the kind of chassis that punishes a soft factory spring rate the moment a tarmac stage throws a compression or a crest at speed. This is a full-size RWD saloon carrying its weight forward, and on broken stage tarmac that mass wants to keep moving after the road stops helping it.

The XYZ Racing Tarmac Rally coilover is built for that job specifically – sealed-stage tarmac work where the surface is quick but rarely smooth. It’s the spec for a Q45 that’s going to see stage roads, not a show stand.

What this coilover does for your 1997-2001 Infiniti Q45

On a car this size, the first thing you notice is how much better the rear stays loaded through a compression instead of unsettling and searching for grip on the way out. The damper is set up to take the impact of a bad tarmac surface – potholes, patched sections, mid-corner ridges – without kicking that hit straight into the body, so the tyre keeps its contact patch instead of skipping. That directly protects traction out of slower stage corners, where a heavy Y33 needs every bit of rear-end bite it can get. The knock-on is a noticeably calmer, flatter platform through direction changes, which matters more on a long-wheelbase saloon than it does on something short and light.

About the Tarmac Rally coilover

This is a damper tuned specifically around tarmac rally use, not a generic fast-road unit relabelled for the job. The valving is built to soak up big hits – kerbs, compressions, patched stage surfaces – and dissipate that energy before it reaches the chassis, which is what keeps the tyre planted and stops the car skating over rough sections. XYZ Racing carries its own tarmac rally programme, and the base settings on this kit come directly from that stage experience rather than a theoretical fast-road baseline. The result is a damper that prioritises controlled body movement and consistent tyre loading over outright stiffness, which is the balance a rally car actually needs when the same set of dampers has to survive an entire stage, not just a single hot lap.

Fitment for the Infiniti Q45 (Y33) (1997-2001)

Built for the Y33-chassis Infiniti Q45, covering the 1997-2001 model years. This kit is the welding-fitment variant for the Y33 – the lower mounting hardware is designed to be welded to the chassis rather than bolted to an existing factory perch, so budget for that step as part of the install rather than treating it as a straight swap.

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Spec your Y33 Q45 below and configure the Tarmac Rally kit for your build.