XYZ Racing Tarmac Rally Coilovers — Audi S4 B5 4WD 1997-2002

The B5 S4’s twin-turbo 2.7 V6 sits ahead of the front axle, so every trail-braked entry into a rally stage’s turn-in loads the nose harder than the quattro drivetrain alone can compensate for. That’s the specific problem the Tarmac Rally coilover is built to answer: a damper tuned to keep all four contact patches working through broken tarmac, crested compressions and mid-corner camber changes, rather than just a stiffer spring stuffed under the strut top.

For sealed-stage tarmac rally use, the S4 B5 4WD needs suspension that survives sustained hard hits without the body kicking sideways off-line. This coilover kit is XYZ Racing’s answer for that exact brief on this exact chassis, built around the AU14-1 platform’s strut geometry and the 4WD driveline’s extra unsprung mass at each corner.

What this coilover brings to your 1997-2002 Audi S4 B5 4WD

Uneven tarmac stages punish a nose-heavy quattro platform in a specific way: the front struts compress hard over crests and mid-corner bumps, and if the damper can’t absorb that impact cleanly, the tyre skips instead of gripping. This kit is calibrated to soak up those big hits without transmitting the jolt straight into the body shell, which keeps the front tyres loaded and the car pointed where you steered it rather than skating wide. Suppressing that shock through the body also settles the rear axle faster after a compression, so the quattro system has a stable platform to put power down out of the exit rather than fighting a car that’s still recovering from the last bump. Owners running the B5 on tarmac stages will feel the difference most under trail-braking into off-camber corners, where the nose-heavy weight distribution normally pushes wide – this coilover keeps that front end planted instead of diving and washing out.

About the Tarmac Rally coilover

The Tarmac Rally coilover is built specifically for the demands of sealed-stage competition on asphalt, where the surface is broken, cambered and rarely flat for more than a few metres at a time. Its damping architecture is calibrated to absorb the impact of uneven road surface and heavy compressions without the body kicking sideways or the shock transmitting straight into the chassis – the kind of hit that unsettles a car mid-stage and costs time through the next few corners. That absorption also does double duty for tyre traction: a damper that soaks up the jolt keeps the contact patch loaded on the surface instead of skipping over it, which matters more on a rally stage than almost anywhere else the car will be driven. The tune isn’t generic – XYZ Racing has built these settings directly from its own Tarmac Rally programme, carrying over what actually works when a car is being driven at the limit on closed asphalt stages rather than a circuit or a fast road. The result is a kit built around stability first: keeping the car composed and predictable as the surface changes under it, corner to corner.

Fitment for the Audi S4 B5 4WD (1997-2002)

This kit is built to the AU14-1 chassis code for the quattro-drivetrain Audi S4 B5, covering the 1997 to 2002 production run. It’s specced for the 4WD platform’s strut mounts and geometry rather than adapted from a front-wheel-drive A4 fitment, so the extra unsprung mass and driveline layout of the quattro system are accounted for in the tune.

What buyers also search for

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Spec your Tarmac Rally kit for the B5 S4 4WD and build yours below.