XYZ Racing Top Sport Coilovers — Infiniti M35 / M45 Y50 FUGA 2WD (Modified Rear Integrated) 2004-2009

The Y50-generation M35 and M45 (badged Fuga at home) is a near-1.8-tonne rear-drive saloon with a VQ35DE or VQ45DE V6 sat well forward of the front axle, and the factory dampers were calibrated for cruising comfort, not for keeping that mass in check mid-corner. Push one into a fast sweeper and the standard suspension lets the nose dive and the outside corner load up unevenly before the chassis settles. The Top Sport kit is built for owners who want that fixed without turning the car into a track-only project – a spec that copes with an occasional circuit day and still rides properly on the way home.

What this coilover does for your 2004-2009 Infiniti M35 / M45 Y50 FUGA 2WD (Modified Rr Integrated)

Fitted to a 2004-2009 M35 or M45, the Top Sport kit raises spring rate and damping meaningfully over the factory setup, which pulls up body roll through faster direction changes without the car feeling brittle over the broken tarmac that a full-sized saloon covers every week. The firmer, better-controlled damper stroke keeps the tyre’s contact patch loaded more consistently under braking and through a corner, which on a heavy rear-drive platform like this translates directly into more usable grip rather than the front tyres simply washing wide. Big compressions – motorway expansion joints, speed humps taken at pace, a badly cambered B-road – get absorbed rather than transmitted straight into the shock body, so the ride stays composed instead of crashing through. The result is a car that turns in with far less of the lean this platform is known for, while still being something you’d happily drive to the circuit and back.

About the Top Sport coilover

Top Sport sits above the factory suspension by roughly 30-50% more damping force, or around 2kg/mm more spring rate, depending on the axle – enough to properly load the tyre on uneven surfaces without tipping into a harsh, fatiguing ride. That extra control is what stops the shock body from moving excessively over sharp inputs, which is where a lot of aftermarket coilovers fall down on a heavy car like the M35/M45. The valving and spring rates here come directly from XYZ Racing’s own Top Sport race programme, carried over rather than softened for road use, which is why the kit holds its composure under repeated hard use across a track day rather than fading after a handful of laps. It’s built as a dual-purpose spec: aggressive enough for genuine track work, controlled enough to live with every day.

Fitment for the Infiniti M35 / M45 Y50 FUGA 2WD (Modified Rr Integrated) (2004-2009)

This kit is built for the Y50-chassis M35 and M45, chassis code IN08, across the 2004-2009 model years, in 2WD form. The "Modified Rr Integrated" designation covers the rear-specific bracket and shock/spring integration needed for this generation’s independent rear end, so make sure your car matches that rear configuration before ordering rather than a standard separate-mount rear setup.

What buyers also search for

• Infiniti M35 M45 suspension upgrade for road and track use
• Y50 Fuga coilover kit with adjustable damping and spring rate
• Infiniti M35 handling upgrade for a heavy rear-drive saloon
• M45 track day coilovers that still ride well on the daily commute

Pick your spec and configure the Top Sport kit for your M35 or M45 below.