XYZ Racing Circuit Master Coilovers — Audi A8 4WD (OE FOR AIR STRUT) (Cancellation Kit for Electronic Damping) 2007-2010

Replacing the D3 A8’s air suspension is not a casual decision. The factory setup – electrically controlled adaptive dampers, air springs that self-level under load – is sophisticated engineering, and owners who convert to a fixed-spring coilover are already past that. They have read the forums, confirmed the chassis code, and decided they want to know exactly what the car will do at corner entry rather than let the factory’s comfort algorithms manage it for them.

The Circuit Master is XYZ Racing’s competition-oriented coilover line, developed specifically for sustained circuit lap-time work rather than road miles. On an A8 quattro – a car pushing close to 1,900 kg depending on body and engine variant – that circuit focus means predictability and consistency under repeated load. The quattro drivetrain delivers traction the factory air suspension was never asked to exploit fully; with compression and rebound handled independently by a circuit-spec unit, that traction becomes something you can actually build a lap around.

What this coilover does for your 2007-2010 Audi A8 4WD

The conversion addresses the most consistent dynamic complaint logged against the D3 A8 on circuit: the float and body roll that air springs introduce under repeated hard cornering. Fixed spring rates – matched to the A8’s considerable kerb weight – mean no mid-corner recalibration, no ride-height drift between sessions. The electronic damping cancellation is built into this application, removing the DCC signal dependency so the coilovers run without fault codes or limp modes. Corner weights and ride height can be set independently across three axes, giving you a starting point for setup rather than a compromise.

About the Circuit Master coilover

The Circuit Master has been tested through XYZ Racing teams across international circuits, developed on tracks where bump inputs are predictable and handling response is the priority. Each unit is adjustable across 9720 distinct settings via three separate knobs – one each for compression, rebound, and ride height – a resolution that sustained lap-time work genuinely uses. The three-knob design routes damper oil through a small-bore passage: over sharp or large inputs the oil moves through that restricted channel, and owners will hear a brief noise in those moments. That is normal, expected behaviour from a circuit-spec damper and not a fault condition. This coilover is built for tracks, where the surface is controlled – not for potholed A-roads where that design characteristic would be a daily irritant.

Fitment for the Audi A8 4WD (2007-2010)

This kit is confirmed for the AU42-C platform Audi A8 quattro, covering model years 2007 to 2010. It is specific to cars equipped with OE air struts and replaces the factory air suspension assembly in its entirety. The cancellation kit handles compatibility with the factory electronic damping system. Buyers should confirm their car carries the air-strut factory build before ordering – not all D3 A8 variants left the factory with adaptive air suspension.

What buyers also search for

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• Audi A8 AU42-C fixed spring coilover replacing OE air suspension
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The Circuit Master ships as a complete conversion for the A8 air-strut platform. Configure your spring rate preference and ride height range below.