XYZ Racing Racing Spec Coilovers — Infiniti M35 / M45 Y50 FUGA 4WD (Modified Rear Integrated) 2006-2010

The Y50 Fuga’s ATTESA E-TS four-wheel-drive system changes how this car loads its rear end compared with the rear-drive M35/M45 most people picture – torque gets shuffled forward the moment the rear starts to slip, so the factory-soft rear spring and shock combination is tuned around comfort, not around holding a line once that torque split kicks in mid-corner. On a car this size, that shows up as a rear axle that feels late to respond and a ride height that was never set up with a circuit in mind.

The Racing Spec coilover kit replaces that rear geometry with a purpose-matched, height-adjustable strut and spring package engineered specifically around this 4WD chassis’s modified rear-integrated mounting point, rather than a generic drop-in. For a Y50 Fuga 4WD owner planning serious track or time-attack days rather than the odd fast road blast, that’s the difference between a car that leans on its factory bushings and one that actually holds a set attitude through a fast direction change.

What this coilover does for your 2006-2010 Infiniti M35 / M45 Y50 FUGA 4WD (Modified Rr Integrated)

With the ride height and damping now set independently of the factory spring rates, you can drop the Fuga’s centre of gravity to a level appropriate for circuit driving without the wallow that comes from running a lowered OE strut on stock valving. The adjustable damping lets you firm up compression and rebound specifically for how the ATTESA system loads the rear under power, so the back axle stops feeling like it’s catching up to the front diff’s torque request and starts working with it. Because the kit is built around this generation’s modified rear-integrated mount rather than a universal bracket, the geometry stays correct through the full range of ride height adjustment instead of drifting out of alignment as you lower it. The result on a heavy 4WD V6 saloon like this is sharper turn-in response and a rear end that stays settled under trail-braking into a fast corner, which is exactly where the standard suspension gives up first.

About the Racing Spec coilover

XYZ Racing built the Racing Spec line directly off circuit-racing programmes, with damping curves pulled from data gathered in series such as the WTCC rather than derived on a road-car test bench. That background is why the valving favours consistency over multiple hard laps instead of a soft, comfort-biased first click. For owners running genuinely aggressive builds – cars closer in spec to a factory racing entry or an A-class competition car than a modified road car – XYZ Racing also offers a custom shock absorber service: you supply the details of what’s already been upgraded on the car and which circuit it’s built for, and the dampers get specified around that combination rather than a stock catalogue setting. On the Y50 Fuga 4WD, that racing-derived baseline gives you a starting point that’s already closer to what a track-focused rear end needs than a fast-road-oriented kit would provide.

Fitment for the Infiniti M35 / M45 Y50 FUGA 4WD (Modified Rr Integrated) (2006-2010)

This kit is built for the Y50-chassis Infiniti M35 and M45 (badged Fuga in other markets) in 4WD guise with the modified rear-integrated mounting configuration, covering the 2006 to 2010 model years under chassis code IN09. Confirm your car is the 4WD variant with this rear mounting spec before ordering, since the rear geometry differs from the standard rear-drive Y50 setup.

What buyers also search for

• Infiniti M35 M45 Y50 Fuga 4WD suspension upgrade for track and time-attack use
• Infiniti Y50 Fuga IN09 coilover damping built for repeat lap sessions
• Racing Spec coilovers for 2006-2010 Infiniti M35/M45 4WD models
• Y50 Fuga rear-integrated coilover fitment for modified 4WD chassis
• XYZ Racing custom shock absorber option for heavily modified Infiniti Fuga builds

Pick your damping and ride-height spec for this Y50 Fuga 4WD build in the configurator below.