XYZ Racing Circuit Master Coilovers — Toyota MARK X GRX120 2004-2009

The GRX120 Mark X arrived as a comfort-led rear-wheel-drive saloon – soft springs, generous travel, and a front end that washes wide once the 2.5 or 3.0-litre V6 loads the outside tyre. The XYZ Racing Circuit Master coilover for the Toyota MARK X GRX120 is built for the opposite priority: sustained circuit lap-time work, where body control matters far more than ride plushness.

This is the firm’s top circuit specification, tested by XYZ racing teams across international tracks and sharing its design with their Racing, Drift and Tarmac Rally setups. For a heavy, nose-led JDM sedan being driven in anger, that translates into a platform that finally stops rolling, diving and squatting through a session.

What these coilovers do for your 2004-2009 Toyota MARK X GRX120

Drop the GRX120 onto the Circuit Master and the first thing you feel is a flatter, more honest chassis. The three adjustment knobs give 9720 distinct damping combinations, so you can split the settings to suit the Mark X’s weight transfer – calming the nose-dive under heavy braking into a hairpin, then freeing the rear to rotate on corner exit. Height adjustment lets you lower the centre of gravity and reset the camber the soft factory setup never used properly. On a long V6 saloon, that control turns a car that runs wide and out of front grip into one you can place to the apex and trust over repeated laps. A faint noise over sharp bumps from the small oil-hole design is normal, and irrelevant on the smooth surfaces this kit targets.

About the Circuit Master coilover

The Circuit Master sits at the top of XYZ Racing’s competition range, sharing design DNA with their Racing Spec, Drift Spec and Tarmac Rally builds. It has been developed over long stretches at international circuits rather than signed off on a bench, and the same damper is run by XYZ racing teams worldwide. Adjustment is the headline: three separate knobs combine to offer 9720 distinct settings, enough granularity to tune the damper to a specific track, tyre and driver. The trade-off of that fine valving is a small-oil-hole passage, so over large bumps the oil moving through the narrow channel can generate a slight noise – the maker confirms this is normal, not a fault. Because the kit is engineered for circuit surfaces, those bumps rarely feature in its intended environment.

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

This kit is cut specifically for the GRX120 Mark X built between 2004 and 2009, matching the chassis code stamped on your car. It suits the rear-wheel-drive V6 saloon as standard. Confirm your exact chassis code against the listing before ordering, then select the spec for your car.

What buyers also search for

• Toyota MARK X GRX120 suspension upgrade for circuit and track-day use
• GRX120 coilovers with three-way adjustable damping for repeat lap sessions
• Toyota Mark X ride-height and camber adjustment for a flatter, lower stance
• Circuit Master coilover setup for a drift or tarmac-rally GRX120 build

Set your ride height, choose your damping and build your Circuit Master spec in the configurator below.