XYZ Racing Tarmac Rally Coilovers — Audi S4 B7 4WD 2004-2008

The B7 S4’s quattro layout piles weight over the front axle the instant you turn in, and on a sealed tarmac stage that nose-heavy balance punishes any damper that just resists load transfer instead of managing it. Corner entry on broken stage surfaces means the front end has to absorb a hit and settle again before the next apex arrives, not two corners later.

XYZ Racing built the Tarmac Rally coilover specifically for that brief: repeated, unpredictable surface changes at speed, where a road-biased setup would either bottom out or bounce the car off line. Fitted to the AU20-2 chassis, it’s aimed at owners running sealed-stage or hillclimb events who need the S4’s weight kept in check without turning the car into a plank on the road sections between stages.

What this coilover does for your 2004-2008 Audi S4 B7 4WD

On a stage surface that changes camber and grip every few metres, the damper’s job is to keep the tyre loaded rather than skipping across the high spots. This kit is set up to absorb the impact of uneven tarmac and take the sting out of larger compressions – potholes, patched sections, mid-corner ridges – without transmitting that shock straight into the body structure. Less shock reaching the chassis means less unsettling pitch and roll through a stage, and a tyre that’s staying in contact with the road puts down more traction exactly when you’re asking for it under braking or at the apex. The net effect on the S4’s nose-heavy quattro platform is a front end that stays composed under load transfer instead of diving and washing wide, which is what lets you carry more speed into a blind stage corner with confidence rather than guesswork.

About the Tarmac Rally coilover

The Tarmac Rally is XYZ Racing’s damper for exactly one job: sealed-stage rally and rough tarmac events, not track lapping. The valving is tuned to soak up big, sudden compressions – kerbs, crests, surface breaks – rather than chase the small, high-frequency inputs a circuit setup would prioritise. That bias toward shock absorption over outright body control is deliberate: it keeps the car’s stability intact when the road surface itself is the unpredictable variable, rather than the driver’s inputs. The damping settings supplied on this kit come directly out of XYZ’s own Tarmac Rally programme, carried over from stage testing rather than derived on a flat skid pad. For the S4, that translates into a coilover built to hold the car’s line and keep the tyre working across a stage surface that never stays the same for two corners running.

Fitment for the Audi S4 B7 4WD (2004-2008)

This kit is built for the AU20-2 chassis code, covering Audi S4 B7 4WD models produced between 2004 and 2008. Confirm your car matches this chassis code and production window before ordering, as coilover geometry and mounting points are specific to this generation of S4.

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Spec your Tarmac Rally kit for the B7 S4 and configure yours below.