XYZ Racing Top Sport Coilovers — Infiniti G37 COUPE CONVERTIBLE USA (Modified Rear Integrated) 2009-2013

The G37’s VQ37VHR sits low and far back in the engine bay, and on the standard dampers that front-heavy weight bias shows up as body roll before the tyres ever hit their limit. XYZ Racing’s Top Sport coilover raises spring rates by roughly 2kg/mm over the street setting and adds 30-50% more damping force, so the chassis stops wallowing into a corner and starts telling you what the front axle is actually doing.

This is the Top Sport line, built for owners who want to run a track day one weekend and drive to work the next without swapping suspension. On a 2009-2013 G37 with the modified Rr Integrated rear end, that means keeping the factory rear geometry intact while still getting a coilover that can absorb a kerb strike at speed rather than kicking the body sideways.

What this coilover does for your 2009-2013 Infiniti G37 Coupe Convertible USA (modified Rr Integrated)

Push the G37 hard into a fast direction change and the extra damping force keeps the body settled instead of loading up on the outside tyre and rolling further than the driver expects. The firmer spring rate cuts the pitch you’d otherwise feel under trail braking into a corner, which matters on a car whose nose is already carrying a lot of the VQ37’s mass. Over broken tarmac and expansion joints – the kind of surface that unsettles a stock G37 mid-corner – the increased damping absorbs the impact rather than passing it straight into the chassis, which keeps the rear tyres loaded and gripping instead of skipping. The result on this Coupe Convertible is a car that turns in flatter, holds its line through mid-corner, and puts power down out of the exit without the rear stepping wide the way it can on soft factory rates.

About the Top Sport coilover

The Top Sport kit is built around the settings XYZ Racing’s own Top Sport racing programme runs, carried over into a road-legal coilover rather than left on the race car. Spring rates are stepped up by around 2kg/mm and damping force by 30-50% versus a comfort-biased street setup, aimed specifically at controlling body movement over rough pavement without turning the ride brutal. That extra damping is there to soak up big hits – kerbs, potholes, sharp compressions – so the shock body isn’t left to absorb the impact on its own, which is what causes traction to drop off right when you need it most. The intent behind the tuning is straightforward: aggressive driving and track days, with the vehicle stability to make the handling predictable rather than nervous. It’s a deliberately narrower brief than XYZ’s full-race lines – built for the driver who wants track-day composure on a car that still has number plates.

Fitment for the Infiniti G37 (2009-2013)

This kit is built specifically for the Infiniti G37 Coupe Convertible USA variant with the modified Rr Integrated rear end, chassis code IN07-1, covering the 2009 to 2013 model years. The modified rear integration is specific to this fitment – check your rear suspension type before ordering to confirm it matches this kit rather than the standard G37 rear layout.

What buyers also search for

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Spec the Top Sport to your G37’s exact rear configuration and build yours below.