XYZ Racing Street Advanced Coilovers — Toyota MARK X GRX120 2004-2009

The GRX120 Mark X rolled out of the factory as a quiet rear-drive executive saloon: long spring travel, soft damping, and the nose-dive under braking and lazy roll into corners that come with a 1.5-tonne V6 cruiser. That comfort tune is precisely what the enthusiast wants to sharpen without throwing away the daily-driver manners that make the platform worth keeping on the road in the first place.

The XYZ Racing Street Advanced coilover for the Toyota MARK X GRX120 is built for exactly that brief – a setup that takes the slack out of the chassis for a spirited road drive or the occasional track day, then winds back to something civilised for the commute. With 720 damping settings on tap, you control how much of that factory softness stays and how much goes.

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

Drop the ride height and the GRX120’s tall centre of gravity comes down with it, so the saloon stops leaning on its outside front tyre and starts turning in cleanly. The 720-way damping adjustment is the headline feature here: run a softer click count for broken UK B-roads and the daily run, then firm it up for a track session to keep body movement in check through a long corner. Brake dive is reined in, so the nose stays planted under hard stops, and on a rear-drive car like this that composure pays off on corner exit when you want the rear axle to put power down rather than squat and scrabble. Height adjustment also lets you set the stance the JDM Mark X scene is known for without resorting to spacers or guesswork.

About the Street Advanced coilover

Street Advanced is XYZ Racing’s most popular line, refined over several years by the company’s own engineering team and validated in competition use around the world before reaching production spec. It is built specifically to straddle two jobs: everyday road driving and the occasional track day, rather than forcing you to pick one. The defining feature is the 720-step damping adjustment, a single-knob system that lets you tune rebound and compression behaviour across a wide range to suit road surface, load, and pace. The result is a coilover that holds the GRX120 flat under load while still soaking up poor surfaces, the kind of kit XYZ positions as essential equipment for drivers who care about both speed and control. Construction is geared toward repeatable performance, not a one-and-done static drop.

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

This kit is matched to the GRX120 chassis Toyota MARK X across the 2004 to 2009 production span, the rear-wheel-drive V6 saloon variant. Confirm your chassis code reads GRX120 before ordering, as the wider Mark X range includes other platform codes with different fitment requirements.

What buyers also search for

• Toyota MARK X GRX120 coilover upgrade for road and occasional track use
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• Adjustable damping coilovers for the rear-drive Mark X V6 saloon
• Toyota MARK X 2004-2009 stance and handling setup with height adjustment

Set your corner heights and pick your damping starting point, then configure yours below.