XYZ Racing Circuit Master Coilovers — Porsche 991 GT3 (without hydraulic lift system) (Cancellation Kit for Electronic Damping) 2013-2019

The 991 GT3’s PASM system does something clever on the road: it reads the car’s behaviour and stiffens the dampers before you ask it to. On circuit, that logic becomes a limitation – you cannot tune around a software algorithm, and you cannot run the geometry and spring rates a serious lap-time session demands while the ECU is still managing shock velocity. The Circuit Master is built for exactly this scenario: it replaces the electronic dampers entirely and includes the cancellation kit to suppress the fault codes that would otherwise follow.

What Porsche gave the 991 GT3 from the factory was already a serious platform – rear-engine rear-drive, with around 60 per cent of the weight sitting behind the rear axle, and active rear steering standard on the 991.2 from 2017. The Circuit Master works with all of that, adding the granular manual adjustability that the stock PASM setup, however sophisticated, was never designed to offer.

What this coilover does for your 2013-2019 Porsche 991 GT3 (without hydraulic lift system) (Cancellation Kit for Electronic Damping)

That rear weight bias is the 991 GT3’s defining characteristic on a circuit: the rear-axle load gives astonishing traction on exit, but the same pendulum effect demands precise damper control under trail-braking. Three independently operated adjustment knobs let you separate front and rear behaviour, finding the balance between front-end bite and rear stability that the 991 platform rewards. With PASM removed, the instrument cluster stays clean and every damping change you make reflects only the inputs from the knobs – not a competing software loop. Spring-rate changes that would previously have been in tension with the factory adaptive logic now respond exactly as intended.

About the Circuit Master

The Circuit Master is XYZ Racing’s highest-specification coilover configuration, developed for sustained circuit use where driver-adjustable damping replaces the compromises of road-biased designs. The headline figure is 9,720 distinct damping combinations, reached through three independent adjustment knobs that each govern a discrete aspect of damper behaviour – a depth of tuning well suited to the iterative nature of circuit setup across qualifying and race-day conditions. The knobs operate via small oil-passage orifices; at high kerb-strike amplitudes or over large surface irregularities, a faint mechanical note from the restricted oil flow is normal and expected – this is how the design functions, not a fault condition. XYZ Racing’s own competition teams have used the Circuit Master across international circuits as part of the development process, validating it through competitive use worldwide. The coilover is built specifically for circuit tracks and is not configured around road comfort.

Fitment for the Porsche 991 GT3 (without hydraulic lift system) (Cancellation Kit for Electronic Damping) (2013-2019)

This listing covers the Porsche 991 GT3 across its 2013-2019 production span – both the 991.1 (2013-2016) and 991.2 (2017-2019) – under chassis code PO17-C, for cars not equipped with the Porsche hydraulic lift system (PDLS). The cancellation kit is not optional: removing the factory PASM units without it will generate persistent damper-system fault codes on start-up. Verify that PDLS is not fitted to your car before ordering; a separate fitment listing covers the PDLS-equipped variant.

What buyers also search for

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The Circuit Master is configured to order – build yours below, choosing the specification that suits your circuit programme.