XYZ Racing Hollow Front Brake Kit — Audi S4 B5 (1997-2002)

The B5 S4 carried its twin-turbocharged 2.7-litre V6 and quattro hardware into a platform already freighted with all-wheel-drive mechanicals and a distinctly front-biased weight distribution. Factory brake specification at 265bhp was adequate; once Stage 1 and Stage 2 remaps became standard practice among UK owners, pushing output well beyond 300bhp, the gap between what the front axle is asked to manage and what the standard brakes can comfortably handle grows apparent under sustained use.

The XYZ Racing front big brake kit is the answer. 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 so the same hardware serves a car that covers a damp morning commute before heading to a circuit.

What this brake kit does for your 1997-2002 Audi S4 B5

The hollow-vane disc draws heat away from the friction surface faster than the conventional factory rotor, directly relevant to a car where repeated hard stops build thermal load quickly. The quattro system’s natural tendency to push understeer into corners means the front brakes always work harder than the rears on the B5, and the greater swept area with improved heat management translates into firmer, more consistent pedal feel when temperatures climb. 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 match the kit to use. Street is the quiet, low-dust default for mixed driving and fast-road work where initial bite and modulation both count. Sport adds bite and heat range for harder driving. Racing handles sustained track conditions where operating temperature stability matters more than cold performance. 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 the hollow-vane disc, a construction that reduces rotating mass through the internal structure while maintaining the thermal capacity needed for repeated hard braking. The internal vanes promote airflow across the friction face, moving heat away from the pad contact zone and raising the point at which fade becomes a factor. The calipers are hollow-bodied as standard for strength without excess weight, with an optional Hollow Racing upgrade for circuit use that drops the dust cover, is rated to 1000C and carries a two-year warranty.

Three pad grades are catalogued to the kit, each calibrated to a different balance of bite, modulation, and operating temperature. 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, integrating with anything from the period alloys the B5 S4 left the factory with to wider fitments that often accompany a deeper suspension build. 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. The kit covers the front axle across the full 1997 to 2002 production span.

Fitment for the Audi S4 B5 (1997-2002)

This front brake kit is catalogued to the Audi S4 B5, covering the complete 1997 to 2002 production run. The B5 S4 was offered in saloon and Avant body styles throughout this period, both with Quattro all-wheel drive as standard, and this kit fits either. If your car has had upright or hub work carried out, confirm the front hub specification matches the factory B5 S4 arrangement before ordering.

What buyers also search for

• Audi S4 B5 front brake upgrade for fast-road and track day use
• B5 S4 big brake kit compatible with 1997-2002 saloon and Avant variants
• Audi S4 2.7T brake kit with Sport and Racing pad compound options
• XYZ Racing hollow-vane disc brake kit for the Audi S4 B5 quattro platform
• Audi B5 S4 front caliper upgrade in Red, Yellow, Gold, Black and Anodized Black

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