XYZ Racing Circuit Master Coilovers — Infiniti M25/ M35/ Q70 Y51 FUGA 2010-2026

The Y51 platform is a long, heavy executive saloon that was never engineered with a Cadwell lap in mind – 1.8 tonnes of FR (or AWD) luxury riding on soft, comfort-biased dampers that wash into understeer the moment you ask the front axle to commit. The Circuit Master coilover is the spec that takes that chassis seriously: a competition-grade damper built for sustained circuit work, sat under a car most people have never seen on a track.

For a 2010-2026 M25, M35 or Q70 Fuga being campaigned at track days or used as a fast-road weapon with circuit ambitions, this is XYZ Racing’s top-tier offering – the same Circuit Master architecture used on their Racing Spec, Drift Spec and Tarmac Rally builds, tested by XYZ race teams internationally.

What this coilover does for your 2010-2026 Infiniti M25/ M35/ Q70 Y51 FUGA

Drop the Fuga onto Circuit Master dampers and the chassis suddenly behaves like the rear-drive sports saloon it was always capable of being. Body roll collapses, weight transfer becomes something you can meter with the throttle rather than something that happens to you, and the front axle stops washing wide on corner entry. The Circuit Master’s 9720 adjustment combinations – delivered through three separate adjustment knobs – let you isolate bump, rebound and high-speed circuit behaviour rather than fighting them all through one compromised dial. On a heavy saloon, that separation matters: you can support the nose under hard braking without locking the rear into a skittery, unloaded mess over kerbs. Ride height comes down cleanly, the stance tightens up, and the car finally responds to steering input on the first degree of lock rather than the third.

About the Circuit Master coilover

Circuit Master sits at the top of the XYZ Racing range and shares its design DNA with the Racing Spec, Drift Spec and Tarmac Rally builds the company supplies to international competition teams. The headline number is 9720 distinct damping configurations, controlled through three separate adjustment knobs rather than the single-knob compromise found on entry-level kits. That granularity is what makes the kit usable across different circuits and different tyre choices without rebuilding the damper. The three-knob architecture uses a small oil-hole design optimised for circuit surfaces; on heavily broken road surfaces or sharp speed bumps the oil flow through the smaller passages can produce a faint audible note – this is a normal characteristic of the competition-grade valving, not a fault, and it is the trade-off you accept for circuit-spec damper control. The kit is built for tarmac race surfaces and the engineering brief is unambiguous: lap-time work, repeated and consistent.

Fitment for the Infiniti M25/ M35/ Q70 Y51 FUGA (2010-2026)

Designed for the Y51 chassis (XYZ part code IN16) covering the M25, M35, Q70 and Fuga variants built from 2010 through to 2026. The Y51 ran a long production cycle under multiple badges across global markets, and this coilover covers the full window. Confirm your specific drivetrain (RWD versus AWD) and trim before ordering, as spring-rate selection should reflect the corner weights you’re actually working with.

What buyers also search for

• Infiniti Q70 coilover upgrade for track days and circuit use
• Infiniti M35 / M25 suspension setup for fast-road and lapping work
• Y51 Fuga competition damper with three-way adjustment
• Lowered Q70 stance with race-grade damping rather than show-only drop
• Heavy executive saloon coilover engineered for sustained lap-time effort

Spec the Circuit Master to suit your Y51’s drivetrain and intended circuit use – configure yours below.