XYZ Racing Gravel Rally Coilovers — Infiniti FX35/37 S51 4WD (Modified Rear Integrated) 2008-2013

At close to two tonnes before crew and spares go in, the FX35/37 S51 carries more mass over its axles than most cars built for a gravel special stage, and the standard all-wheel-drive suspension was never asked to survive repeated hard compression over rutted farm tracks or washed-out fire roads. XYZ Racing’s Gravel Rally coilover replaces that setup with hardware built for the compression cycles a stage car sees on every run, not the occasional pothole a road car meets on a commute.

This is the Gravel Rally spec, built for cars that spend their working life sideways on loose surfaces rather than on tarmac. On the FX35/37’s 4WD Modified Rr Integrated rear end it’s set up to take the chassis vibration and G-force that come with sustained high-speed running over broken ground, not just survive it.

What this coilover does for your 2008-2013 Infiniti FX35/37 S51 4WD (Modified Rr Integrated)

Fit this coilover to your FX35/37 and the first thing you’ll notice crossing a rutted stage is how much less the chassis crashes through its travel. The long-stroke damper and long spring absorb the initial vibration from sandstone, silt or snow-packed gravel before it reaches the cabin, so the AWD driveline stays loaded evenly instead of hopping across ridges. Because the FX35/37 sits heavier and taller than most stage cars, hard direction changes on loose surfaces load the outside dampers hard – the inverted tube construction is built to take that side load without the shaft flexing, which keeps the rear axle tracking straight out of a compression instead of skating wide. Across a full stage the result is a chassis that settles faster after a jump or a washout, so you’re back on the power sooner rather than waiting for the suspension to catch up.

About the Gravel Rally coilover

XYZ Racing developed the Gravel Rally coilover specifically for rally and rallycross use, where the road surface changes constantly and does more damage to a damper than almost any other motorsport discipline. Rather than a conventional single-tube layout, it uses an inverted tube design that keeps the working shaft protected inside the body rather than exposed to flying stone and grit, which matters when a single stage can throw sandstone, snow and silt at the suspension within the same run. The stroke and spring are both longer than you’d fit for tarmac work, giving the damper enough travel to absorb chassis vibration from a rough surface and to shrug off the heavy G-force generated when the car is thrown hard into a corner. Spring rates aren’t a desk exercise either – every rate in the range has been set using data from XYZ’s own rally racing team, so the numbers reflect what actually survives a stage rather than a theoretical calculation.

Fitment for the Infiniti FX35/37 S51 4WD (Modified Rr Integrated) (2008-2013)

This kit is built for the Infiniti FX35/37 on the S51 chassis, internal code IN01, across the 2008-2013 production run. It’s specified for the 4WD Modified Rr Integrated rear end, so confirm your car uses the integrated rear shock and spring mounting before ordering rather than an earlier or aftermarket rear conversion.

What buyers also search for

• Infiniti FX35/37 S51 gravel rally suspension upgrade for stage and rallycross use.
• Infiniti FX35/37 coilover kit built to survive sandstone, silt and snow-covered gravel stages.
• Infiniti FX 4WD Modified Rr Integrated rally damper set with long-stroke travel for washed-out tracks.
• Infiniti FX35/37 S51 spring rate options developed from XYZ’s own rally racing team data.

Pick the spring rate that matches your stage programme and build your FX35/37’s Gravel Rally kit below.