EBC S9KR1664 Rear Brake Kit for 2020-2023 Audi A4/A6/SQ5 2.0L/3.0L

Vehicle Fitment

• 2020 Audi A4 (Premium, Premium Plus, Prestige; 2.0L I4 Turbo; AWD/Quattro)
• 2020-2023 Audi A6 allroad (Premium Plus, Prestige; 3.0L V6 Turbo; AWD/Quattro)
• 2020-2023 Audi SQ5 (Premium, Premium Plus, Prestige; 3.0L V6 Turbo; AWD/Quattro)

Fitment Notes

• Rear brake application only.
• Fits the specified rear 330 mm vented rotor configuration.
• Audi A4 application is limited to the 2020 model year and listed Premium, Premium Plus and Prestige trims.
• Audi A6 allroad applications cover 2020-2023 Premium Plus and Prestige trims.
• Audi SQ5 applications cover 2020-2023 Premium, Premium Plus and Prestige trims.
• All validated applications use the applicable quattro all-wheel-drive configuration.
• Verify the factory rear rotor dimensions and brake configuration before installation.
• 2024-2026 applications are not included because complete two-source validation for those model years was not established.

Features

• EBC Stage 9 Yellowstuff and USR rear brake kit.
• DP42435R Yellowstuff high-friction rear brake pads.
• USR1846 USR fine-slotted sport rear rotors.
• 330 mm rear rotor diameter.
• 22 mm nominal rotor thickness.
• 36.1 mm rotor height.
• 68 mm center bore.
• 5-bolt mounting configuration.
• Vented 1-piece cast-iron rotor construction.
• Fine-slotted rotor surface helps evacuate water, dust and friction gases.
• Geomet anti-rust coating helps protect exposed rotor surfaces from corrosion.
• Yellowstuff aramid-fiber high-friction pad compound is designed for performance applications.
• Brake-In coating promotes faster pad seating and bedding.
• Fully shimmed, chamfered and slotted pads help manage brake noise.

Specifications

• Brand: EBC Brakes
• Part Number: S9KR1664
• Series: Stage 9 Yellowstuff Pad and USR Series Rotor Kit
• Position: Rear
• Pad Part Number: DP42435R
• Pad FMSI Number: D2364
• Rotor Part Number: USR1846
• Rotor Quantity: 2x
• Rotor Diameter: 330 mm
• Rotor Thickness: 22 mm
• Rotor Height: 36.1 mm
• Rotor Center Bore: 68 mm
• Rotor Mounting Pattern: 5 bolt holes
• Rotor Construction: 1-piece cast iron
• Rotor Type: Vented
• Rotor Style: Fine slotted
• Rotor Finish: Geomet anti-rust coated
• Pad Material: Aramid fiber
• Drivetrain: AWD/Quattro

Included Components

• 1x EBC DP42435R Yellowstuff rear brake pad set
• 2x EBC USR1846 rear brake rotors
• 1x Caliper lubricant

Product Description

The EBC S9KR1664 Stage 9 Rear Brake Kit combines DP42435R Yellowstuff high-friction brake pads with two USR1846 fine-slotted sport rear rotors. The package is designed for the specified Audi A4, A6 allroad and SQ5 applications using the 330 mm rear vented-brake configuration, providing a matched performance-oriented replacement for the factory rear braking system.

The USR1846 rotors feature a 330 mm diameter, 22 mm thickness, 36.1 mm height and 68 mm center bore with a five-bolt mounting pattern. Their vented one-piece cast-iron construction and fine-slotted friction surface help manage heat while providing paths for water, dust and friction gases to escape. The Geomet anti-rust coating provides additional protection for exposed rotor surfaces.

The DP42435R Yellowstuff pads use EBC's aramid-fiber high-friction compound and Brake-In coating to support strong braking response and faster bedding. The pads are fully shimmed, chamfered and slotted for controlled operation. S9KR1664 is a vehicle-specific rear brake package, so the vehicle's model year, trim, engine, drivetrain and factory rear brake configuration should be verified before installation.