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

The FX35/37 S51’s 4WD platform is a heavyweight for stage work – which is exactly why this Modified Rr Integrated spec exists. Pro Rally competition asks for more wheel travel and a more rigid mounting structure than the standard chassis points can give, so XYZ Racing builds this coilover into a rear end that’s already been structurally reworked, not bolted to a stock one.

Where a road-going coilover trades on ride comfort and daily damping range, this is a competition rally set-up developed for gravel and snow stages, where wheel travel and mounting integration matter more than outright spring stiffness. It’s the spec built for FX35/37 S51 cars already committed to top-flight rally competition, not weekend track days.

What this coilover does for your 2008-2013 Infiniti FX35/37

On a 4WD platform as heavy as the S51, unsupported wheel travel is the first thing to go once the surface turns to gravel or snow – geometry that isn’t integrated into the chassis flexes under repeated compression and starts to lose its line. Building the Pro Rally coilover into a modified rear end keeps the mounting points rigid under that load, so the FX35/37 holds its intended geometry through square-edge hits and off-camber sections instead of walking off line. That rigidity also means more consistent traction transfer to all four corners in low-grip conditions, and a rear axle that holds its location through the repeated compression cycles a stage produces, rather than degrading corner by corner. For a car this heavy, that structural integration matters as much as the spring and damper themselves.

About the Pro Rally coilover

XYZ Racing draws a clear line between two classes of rally gravel and snow suspension. One bolts straight into the original chassis mounting points – an amateur-grade fitment that inherits whatever geometry and clearance the factory subframe allows. The other, which this FX35/37 kit belongs to, is built to go in only after the rear end has been structurally modified, so the coilover is integrated into reworked bodywork rather than adapted to a road car’s original mounting points. That’s the difference between a coilover that merely fits a rally car and one designed as part of it. This is the professional-installation route XYZ Racing specifies for the S51’s Modified Rr Integrated configuration, and it’s built around the 4WD driveline the FX35/37 carries into stage work.

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

This kit is specified for the S51-generation Infiniti FX35/37, 4WD, covering the 2008 to 2013 model years. It’s built specifically for the Modified Rr Integrated configuration – cars whose rear end has already been structurally reworked for rally-spec suspension mounting, not the standard bolt-in points. Confirm your car matches this rear-end specification before ordering, since XYZ Racing lists the direct-fit and modified rally coilover as separate kits.

What buyers also search for

• Infiniti FX35/37 S51 rally suspension for gravel and snow stages
• Infiniti FX35/37 4WD coilover built for a modified, integrated rear end
• FX35/37 S51 Pro Rally coilover for top-flight rally competition
• Infiniti FX S51 stage suspension with structurally integrated mounting

This is a competition-specification fitment built around a modified rear end, so confirm your S51’s configuration matches before ordering – pick your spec below.