Audi A4 / S4 Brake Kit Guide: Performance Upgrade

Quattro all-wheel drive is part of why the A4 feels so planted, but it also means the brakes absorb more of the car's momentum than a front-wheel-drive sedan with similar output — less energy is lost to wheelspin off the line, more is left for the pads and rotors to convert into heat on the way back down.

Ghost Brakes offers a complete bolt-on brake kit for the Audi A4 / S4 — G11H18 1-piece drilled and slotted rotors with carbon ceramic pads, GEOMET coating, and a lifetime warranty. No caliper modifications required.

Shop this vehicle: Audi A4 / S4 brake kits · 2-piece rotors · All products

Why A4 and S4 Brakes Wear Faster Than the Spec Sheet Suggests

A4 owners are often surprised at how quickly factory pads glaze, given the car's modest on-paper power figures. The real explanation is quattro: all-wheel drive is efficient at putting power down, so very little of the engine's output is wasted as wheelspin under hard acceleration — which means almost all of it eventually has to be scrubbed off by the brakes. Add B9.5's mild-hybrid assist and the S4's extra 100+ horsepower, and factory G3000 rotors on a daily-driven A4 or S4 glaze and warp well before most owners expect a brake job.

Ghost Brakes addresses that with a matched rotor-and-pad system: drilled and slotted rotors for heat evacuation, GEOMET coating for corrosion resistance, and carbon ceramic pads for stable friction under heat and significantly less dust than OEM.

What's in the Ghost Brakes Audi A4 / S4 Kit

• G11H18 1-piece drilled and slotted rotors (front and rear)
• Carbon ceramic brake pads — matched compound for our rotor face
• GEOMET full-surface corrosion coating
• All necessary hardware included
• Lifetime warranty — no mileage caps
• Free shipping

Installation and Bedding

Ghost Brakes Audi A4 / S4 kits are direct bolt-on replacements for the factory quattro caliper carrier — no spacers, no adapter brackets, no brake line changes. Install with standard hand tools in a driveway or an independent shop; follow our bedding procedure afterward to establish proper pad transfer layer and avoid noise or uneven wear.

A4 Allroad and S4: One Platform, Two Very Different Loads

An Allroad wagon loaded for a camping trip and an S4 pushed hard through a canyon put very different demands on the same basic brake package — factory parts are a compromise across both use cases, sized to a cost target rather than either extreme. A Ghost Brakes kit is built to handle both without fading: enough thermal capacity for a loaded wagon on a mountain descent, enough bite for a spirited S4 driver who wants real stopping power to match the engine.

Compare and Research

Not sure Ghost Brakes is right for your A4 or S4? Read our comparison guides: vs PowerStop Z36, vs Brembo, vs EBC Redstuff. Or explore our 2-piece rotors tech page for the engineering behind our rotor and pad design.

Frequently Asked Questions

What brake kit fits a Audi A4 / S4?

Ghost Brakes offers G11H18 1-piece drilled and slotted rotors with carbon ceramic pads for the Audi A4 / S4. Use our shop-by-car page or vehicle selector to confirm exact fitment for your model year and trim.

Why do quattro A4 brakes wear faster than expected?

Quattro all-wheel drive puts A4 power down more effectively than a FWD sedan with similar output, which means less energy is lost to wheelspin and more is left for the brakes to scrub off on every stop. That extra thermal load glazes factory pads and rotors faster than most owners expect from a car with modest power figures on paper.

Are Ghost Brakes Audi A4 / S4 kits bolt-on?

Yes. Every Audi A4 / S4 kit bolts to factory quattro calipers with no machining. Confirm year and trim in the product grid or fitment tool before ordering.

What is the difference between G11H18 and G3000 rotors?

G11H18 is high-carbon iron used on Ghost Brakes 555 drilled and slotted rotors — better heat absorption and warp resistance than OEM G3000 zinc-coated castings. Real G11H18 cannot be zinc-plated; GEOMET proves the metallurgy upgrade.

Do A4 kits include pads and a warranty?

Complete kits include matched carbon ceramic pads, hardware, lifetime warranty, and free continental US shipping.

How do I pick the right A4 kit for my year?

Use the model filter bubbles on the shop-by-car page or the year-specific fitment link to open kits filtered to your exact Audi A4 year and trim.

Ready to upgrade your Audi A4 / S4? Shop Audi A4 / S4 brake kits at Slyde Over. Free shipping. Lifetime warranty. Bolt-on install.

Audi A4 Brake Kit Shopping Checklist

Before you add a audi a4 brake kit to cart, confirm rotor diameter, hat height, and pad shape for your exact year and performance package. Optional packages (sport brakes, track packages, tow packages) can change front rotor size even when the model name on the window sticker looks the same. Use our Audi A4 shop-by-car page to filter live SKUs, or open the year-specific fitment link from that hub if you already know your trim.

Match rotors and pads as a set whenever possible. Fresh pads on worn or heat-checked rotors transfer uneven friction material and feel like "warp" within a few hundred miles. Ghost Brakes kits ship matched G11H18 rotors (or 2-piece fronts where offered) with carbon ceramic pads so thermal capacity and friction stay balanced axle to axle.

Compare tier choices in our 2-piece vs 1-piece rotor guide and read Ghost Brakes vs Brembo if you are deciding between dealer OEM replacements and a performance-minded upgrade that still bolts to factory calipers.

Install, Bedding, and When to Upgrade Audi A4 Brakes

Plan on a standard brake service timeline: clean hub faces, replace hardware where included, torque lugs to spec, and bed pads using the steps in our performance rotor break-in guide. Skipping bedding is the fastest way to get noise, dust, or a long pedal on otherwise good hardware — especially on heavier or AWD variants where the front axle does most of the work.

Upgrade when you feel fade on repeated hard stops, see blueing on factory rotors, or fight constant dust on expensive wheels. Maintenance intervals alone do not tell the whole story for enthusiast driving. When you are ready to order, browse the full brake kit catalog or return to the Audi A4 hub for model-filtered kits.

Rotor slot and coating engineering is documented on Ghost Brakes technology pages — Slyde Over handles checkout, tracking, and warranty registration for every complete kit.