XYZ Racing Hollow Front Brake Kit — Audi S4 B7 (2005-2008)

The B7 S4’s 4.2-litre V8 sits well forward in the chassis, and at over 1,650kg in quattro guise the kinetic energy involved in a hard stop from motorway speed is substantial. Under repeated braking, on a sprint day or a long fast-road run through the Highlands, standard hardware begins to show its limits: progressive fade, a softening pedal, and the hesitation that follows from not knowing quite where the brakes will be next. The XYZ Racing front big brake kit is built to hold up to exactly that pattern of use.

It fits as a matched pair of front calipers and two-piece floating discs across the front axle, with three pad compounds and a full range of caliper finishes that give owners control over how the hardware presents through the S4’s alloys.

What this brake kit does for your 2005-2008 Audi S4 B7

The hollow-vane disc improves heat dissipation compared to the standard ventilated rotor, which matters most on a heavy AWD platform where the front axle handles a significant share of the braking load. The quattro B7’s mass and front-weight bias mean that under hard stops the front rotors absorb more thermal energy than the rear, and the hollow-vane design addresses this by drawing heat away from the friction surface more efficiently during sustained use. The two-piece floating construction lets the disc grow with temperature without warping the bell and trims rotating and unsprung mass off the front corners, and braided lines come as part of the kit to firm up the pedal.

Three pad compounds tune the kit to use. Street is the quiet, low-dust default that raises the bite threshold above standard pads without requiring elevated operating temperatures to wake up, a capable choice for fast-road use on a car that generates real heat under spirited driving. Sport adds bite and heat range. Racing shifts the working window further still, bringing consistent response across consecutive hard stops, the kind of repeated braking that exposed the limits of the factory setup. Included painted caliper colours are Red, Yellow, Gold, Black and Anodized Black at no extra cost.

About the front brake kit

The kit is built around a hollow-vane disc, a construction approach that prioritises thermal resilience through improved heat flow rather than added mass. The design creates a more efficient path for heat to move away from the disc’s friction face during sustained braking, keeping temperatures and therefore pedal feel more stable when the hardware is worked hard. The calipers are hollow-bodied as standard for strength without excess weight, with an optional Hollow Racing upgrade for competitive event driving that drops the dust cover, is rated to 1000C and carries a two-year warranty.

Three pad compounds cover the full range of use cases: Street for the road, Sport for fast-road and occasional track work, and Racing for event driving where operating temperatures run consistently higher. Beyond the included painted finishes, a Custom Color in any Pantone is available, along with premium polished-forged Titanium, Polished Gold and Polished Silver and candy Teal, Blue, Red and Orange, so the hardware can match an existing build colour or stand apart as a deliberate contrast. Discs come drilled or slotted at the same price, and centre-bell upgrades, two-tone in five anodized colours or in titanium, are selectable at checkout.

Fitment for the Audi S4 B7 (2005-2008)

This front kit is confirmed for the B7-generation Audi S4, covering the full production run from 2005 to 2008. The B7 ran the 4.2 FSI V8 quattro throughout that period, and all body styles share the front axle configuration this kit is built around. Buyers with non-standard front axle components, spacers, geometry-altering suspension parts, or uprated caliper carriers should confirm clearances before ordering.

What buyers also search for

• Audi S4 B7 front brake upgrade for fast-road and track use
• B7 S4 V8 big brake kit with multiple pad compound options
• Audi S4 B7 hollow-vane disc front brake kit covering 2005 to 2008
• S4 B7 quattro caliper upgrade in Red, Yellow, Gold, Black and Anodized Black
• Audi B7 S4 front big brake kit with the Racing compound for repeated hard stops

Pick your pad compound and caliper finish from the options above, and we build it to your spec.