XYZ Racing Top Sport Coilovers — Infiniti M25/ M35/ Q70 Y51 FUGA 2010-2026

The Y51 platform is a heavyweight luxury saloon riding on Nissan’s FM architecture, sharing DNA with the 370Z and Skyline but carrying considerably more mass over the front axle thanks to the VQ25HR, VQ35HR, or VQ37VHR up front. Out of the box, the M25, M35, and Q70 FUGA prioritise long-wheelbase ride comfort over body control – which is exactly what becomes the limiting factor the moment you try to drive one quickly.

The XYZ Racing Top Sport coilover is built for owners who want to wake that chassis up without surrendering the everyday usability that makes the Y51 worth keeping. It targets occasional track day work alongside a daily commute on UK B-roads, and it does so by raising damping and spring rates meaningfully above street tune rather than just lowering the ride height.

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

Spring rates roughly 2 kg/mm above street settings, combined with damping wound up 30 to 50 percent stiffer, settle the Y51’s long body and stop the nose diving on heavy braking into a corner. Mid-corner, the heavier rate keeps the outside front loaded rather than letting it wash wide – a real change in a saloon this size. The Top Sport’s damping profile is calibrated to absorb sharper hits from broken tarmac and expansion joints rather than transmit them, so the car stays planted across uneven surfaces and the tyres keep their contact patch when the road turns rough. Ride height comes down to suit the wider stance the Y51 always looked like it wanted, and corner balance becomes something you can actually set rather than accept.

About the Top Sport coilover

Top Sport sits in XYZ Racing’s range as the spec aimed squarely at fast-road plus occasional circuit use, and the rates reflect that brief. By raising damping force 30 to 50 percent over street tune and adding approximately 2 kg/mm of spring rate, the kit absorbs impacts from uneven pavement and big bumps without unsettling the body. The result is a coilover that suppresses shock through the chassis, increases tyre traction under load, and gives the driver a stable platform to lean on. The settings are drawn directly from XYZ Racing’s own Top Sport circuit programme, which means the damping curves were validated on track rather than reverse-engineered from a street setup. It is suited to track day use and aggressive driving without abandoning the manners required for the daily drive home.

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

This kit is built for the IN16 chassis covering the M25, M35, and Q70/FUGA Y51 saloon from 2010 through 2026. Confirm your specific variant and drivetrain before ordering – rear-wheel drive and all-wheel drive Y51 models can carry different geometry at the front.

What buyers also search for

• Infiniti Q70 coilover upgrade for track day and daily street use
• M35 FUGA Y51 suspension that handles UK road surfaces without crashing
• Adjustable coilover for the Y51 chassis with circuit-validated damping
• Infiniti M25 height-adjustable coilovers for a lowered fast-road stance
• Q70 FUGA coilover kit with stiffer rates than factory sport suspension

Pick your spring rate and ride height preference in the configurator below to build your Top Sport coilover spec for the Y51.