XYZ Racing Top Sport Coilovers — Porsche 991 GT2/ RS (without hydraulic lift system) (Cancellation Kit for Electronic Damping) 2017-2026

The 991 GT2 RS was Porsche’s most uncompromising road-legal 911 of the generation – 700PS through the rear wheels, a weight distribution that sits heavily over the rear axle, and factory PASM electronics making continuous micro-adjustments to the damping. For circuit work, that adaptive logic creates a specific problem: you cannot predict exactly what the rear will do at a given corner entry when the ECU is constantly varying the rates. Drivers who have tracked this car seriously tend to arrive at the same conclusion – they want their own known values, not managed ones.

This Top Sport coilover kit is the hardware answer to that. It cancels the factory electronic damping system entirely, substituting a manually calibrated setup whose rates originate from XYZ Racing’s own track programme. The kit is specified for cars built without the optional hydraulic front lift system.

What this coilover does for your 2017-2026 Porsche 991 GT2/ RS

Running spring rates approximately 2kg/mm above the street calibration and damping tuned 30-50% firmer, the setup addresses precisely the characteristic that makes the GT2 RS demanding on circuit: a rear axle carrying the majority of the car’s mass that must behave predictably under braking and corner entry. With the adaptive electronics removed and the damper held at a fixed, known setting, what the rear does at the apex becomes readable rather than managed by software. Tyre contact patch consistency improves across the surface variation found on UK circuits and fast roads, translating directly into traction and stability gains. The calibration retains enough compliance for the drive to the venue – this is not a race-only setup.

About the Top Sport coilover

The Top Sport is XYZ Racing’s track-day-biased coilover line, built for owners who use their car hard at circuit events while still commuting in it. Its spring and damping rates are drawn from XYZ Racing’s own track testing programme – not arbitrary numbers extrapolated from a street product. The 2kg/mm spring rate uplift over the street equivalent is calibrated to absorb the impact of uneven road surfaces at pace without permitting excessive body movement, while the 30-50% damping increase suppresses shock body oscillation and keeps the tyre loaded through and beyond the apex. Across the range, Top Sport settings are validated for track day and aggressive driving use cases, with vehicle stability and traction improvement as the primary design targets rather than outright lap pace.

Fitment for the Porsche 991 GT2/ RS (2017-2026)

This kit is built for the Porsche 991 GT2/ RS under chassis code PO18-C, covering the 2017-2026 production span. Two specific conditions must be confirmed against your car’s build sheet: the hydraulic front axle lift system must not be fitted, and the kit includes the cancellation hardware required to replace the factory electronic damping (PASM). Verify both before ordering.

What buyers also search for

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• 991 GT2 RS PASM cancellation coilover kit 2017-2026

Check your car’s options list against the fitment notes, then configure your specification using the options below.