EBC S9KR1663 Rear Brake Kit for 2020 Audi A4 2.0L I4 Turbo

Vehicle Fitment

• 2020 Audi A4 (Premium, Premium Plus, Prestige; 2.0L I4 Turbo; FWD/AWD where equipped)

Fitment Notes

• Rear brake application only.
• Validated application is for the B9-generation Audi A4 using the specified 300 mm solid rear rotor configuration.
• 2020 A4 Premium, Premium Plus and Prestige trims are specifically identified in the available application data.
• Quattro AWD and front-wheel-drive configurations require matching the factory rear brake dimensions before installation.
• 2021-2026 Audi A4 applications are not assigned because complete S9KR1663 coverage beyond 2020 was not sufficiently confirmed.

Features

• EBC Stage 9 Yellowstuff and USR rear brake kit.
• Yellowstuff high-friction rear brake pads.
• USR fine-slotted sport rear rotors.
• 300 mm rear rotor diameter.
• 12 mm nominal rotor thickness.
• 36 mm rotor height.
• 68 mm center bore.
• 5-bolt mounting configuration.
• Solid cast-iron rear rotor construction.
• Fine slots help clear brake dust, water, debris and friction gases.
• Geomet anti-rust coating protects exposed rotor surfaces.
• Brake-In coating promotes faster Yellowstuff pad bedding.
• Fully shimmed and chamfered pads help reduce unwanted brake noise.

Specifications

• Brand: EBC Brakes
• Part Number: S9KR1663
• Series: Stage 9 Yellowstuff and USR
• Position: Rear
• Pad FMSI Number: D2364
• Rotor Quantity: 2x
• Rotor Diameter: 300 mm
• Rotor Thickness: 12 mm
• Rotor Height: 36 mm
• Rotor Center Bore: 68 mm
• Mounting Pattern: 5 bolt holes
• Rotor Construction: Solid cast iron
• Rotor Style: Fine slotted
• Rotor Finish: Geomet anti-rust coating
• Pad Material: Aramid fiber
• Engine: 2.0L I4 Turbo
• Position: Rear axle

Included Components

• 1x EBC Yellowstuff rear brake pad set
• 2x EBC USR1535 rear brake rotors

Product Description

The EBC S9KR1663 Stage 9 Rear Brake Kit combines EBC Yellowstuff high-friction rear brake pads with a pair of USR1535 fine-slotted rear rotors. The validated application is the 2020 Audi A4 B9 with the specified 300 mm solid rear brake configuration, providing a performance-oriented replacement for compatible factory rear braking components.

The USR1535 rotors measure 300 mm in diameter, 12 mm in thickness and 36 mm in height, with a 68 mm center bore and five-bolt mounting pattern. The solid cast-iron construction uses EBC's fine-slot design to help clear water, dust, debris and friction gases from the braking surface. Geomet coating provides corrosion protection on exposed non-friction surfaces.

The Yellowstuff pads use EBC's high-friction aramid-fiber compound and Brake-In coating to support strong braking response and faster bedding. S9KR1663 is a vehicle-specific rear brake package, so the vehicle's year, trim, drivetrain and factory rear brake dimensions should be confirmed before installation.