XYZ Racing Circuit Master Coilovers — Audi A8L 4WD (OE FOR AIR STRUT) 2010-2017

The D4 A8L is not the obvious circuit car. Long-wheelbase, quattro, and from the factory it floats on air struts that prioritise limousine isolation over body control – exactly the trait you need to delete before the front axle will commit to a kerb. The Circuit Master replaces that air system entirely with a coilover built around 9720 individual damping settings, giving you a way to actually pin down a 5.3-metre saloon on a hot lap.

This is XYZ Racing’s top-tier circuit damper, the same platform their factory teams run on international tarmac. For an A8L 4WD owner converting from OE air to a serious track setup, it is the only spec in the range that makes sense – the lower three tiers were never built to deal with a car this heavy hammering through sustained sessions.

What this coilover does for your 2010-2017 Audi A8L 4WD

On the road the OE air strut is excellent at hiding mass. On a circuit it hides nothing – the nose dives under brakes, the rear squats out of corners, and the body never settles. Swapping to the Circuit Master gives you a fixed-rate platform you can actually read through the wheel. The 9720-setting damping window means you can soften the car for a bumpy national circuit, then go harder for smoother continental tarmac, without changing parts. Three separate adjustment knobs split bump and rebound control so you can address front-end push and rear-axle squat independently – useful on a nose-heavy quattro that wants to understeer into the first apex. Ride height comes down to a sensible track stance, and brake response sharpens because the chassis stops pitching mid-corner.

About the Circuit Master coilover

The Circuit Master sits at the top of the XYZ Racing range alongside their Racing Spec, Drift Spec, and Tarmac Rally builds, and it is the unit XYZ teams have been running and refining on circuits worldwide. Damping is controlled through three adjustment knobs feeding 9720 distinct settings between bump and rebound – granular enough that experienced drivers can resolve front-to-rear balance issues rather than just stiffening the whole car. The valving uses a small-orifice design optimised for smooth track surfaces; over genuinely large bumps the oil moving through the restricted passage can produce a faint hydraulic noise, which is normal behaviour for this construction and not a fault. It is engineered for circuit work, not for crashing over potholes on a B-road commute. Body, spring perches and adjusters are built to take repeat heat cycles without losing consistency through a day of sessions.

Fitment for the Audi A8L 4WD (2010-2017)

Built specifically for the long-wheelbase D4 A8L 4WD chassis code AU49 between 2010 and 2017, as a direct replacement for the original air-strut suspension. This is the OE-for-air-strut variant – converting cars away from the factory air system to a conventional coilover platform.

What buyers also search for

• Audi A8L D4 air-to-coil conversion for circuit and track-day use
• Audi A8L 4WD coilover with independent bump and rebound adjustment
• D4 A8L suspension upgrade with adjustable ride height for quattro
• Circuit-spec damping for nose-heavy long-wheelbase Audi saloons
• XYZ Racing top-tier coilover for sustained lap-time work

Configure your spec below – chassis code, fitment notes, and damping options are all set out in the configurator.