XYZ Racing Top Sport Coilovers — Toyota MARK X GRX120 2004-2009

The GRX120 Mark X left Toyota tuned for the comfort of a Japanese executive saloon, which means a rear-drive V6 chassis that floats over crests and leans early the moment you commit to a corner. The XYZ Racing Top Sport coilover is the answer for owners who want that softness traded for body control, without turning a daily saloon into a cage-and-harness track car.

Top Sport sits in the XYZ Racing range as the occasional-track-day option: firmer than a street kit, yet still civil enough to drive to work on Monday. For a 4GR-FSE GRX120 riding on tired factory dampers, it is the natural first move from standard ride height into a properly controlled set-up.

What this coilover does for your 2004-2009 Toyota MARK X GRX120

Lower the ride height and the Mark X’s tall, comfort-led stance disappears, dropping the centre of gravity and sharpening how the nose responds to steering. The roughly 2kg/mm jump in spring rate over a street setting, combined with 30 to 50 per cent more damping force, keeps the body flat through quick direction changes, so the rear axle stops squatting and pitching under power. On a rear-drive saloon that matters most on corner exit, where the extra wheel control puts the V6’s torque down through the outside rear tyre instead of feeding it into body roll. Hit a ridge or a patched surface mid-corner and the damping soaks up the jolt, keeping the tyre loaded rather than skipping.

About the Top Sport coilover

Each Top Sport kit is built around spring rates near 2kg/mm stiffer than the street tune, paired with damping raised by 30 to 50 per cent over the same baseline. That pairing is deliberate: enough valving to absorb a sharp impact when the car crosses a broken surface or a kerb, while suppressing the secondary shock that would otherwise pass straight into the shell. The payoff is more consistent contact between tyre and road, which is where traction and stability actually come from. XYZ Racing draws these settings from its own Top Sport racing experience, so the baseline is a competition-derived compromise aimed at track days and harder road driving rather than outright plushness. Height adjustment lets you set the GRX120’s stance and corner balance around your tyres and how you drive.

Fitment for the Toyota MARK X GRX120 (2004-2009)

This kit is cut specifically for the GRX120 Toyota Mark X built between 2004 and 2009, the rear-drive 2.5-litre V6 chassis from Toyota’s N-platform era. It mounts to the factory pick-up points for that chassis code, so a standard car needs no fabrication to fit it.

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Set your GRX120’s ride height and spring spec around how you actually use the car – configure yours below.