Expanding on our current support for the VAG vehicles, we’re proud to announce release of tuning support for the B9/B9.5 S4 and S5 models for the United States market! These cars respond surprisingly well to tuning with the 3.0L turbocharged V6 engine providing substantial torque and power gains over stock allowing these luxury cars to have the GO to match the SHOW and hit above their weight class.

Supported Vehicles:

For a complete listing of COBB products available for the Audi B9/B9.5 S4 & S5, head to the vehicle pages below!

• 2018 Audi S4 (B9) USDM
• 2019 Audi S4 (B9) USDM
• 2020 Audi S4 (B9) USDM
• 2021 Audi S4 (B9) USDM
• 2022 Audi S4 (B9.5) USDM
• 2023 Audi S4 (B9.5) USDM

• 2017 Audi S5 (B9) USDM
• 2018 Audi S5 (B9) USDM
• 2019 Audi S5 (B9) USDM
• 2020 Audi S5 (B9) USDM
• 2021 Audi S5 (B9) USDM
• 2022 Audi S5 (B9.5) USDM
• 2023 Audi S5 (B9.5) USDM

Accessport for Audi B9/9.5 S4 and S5

This part is legal under the provisions of EPA’s Anti-Tampering Policy. COBB Tuning has established a reasonable basis (testing results) to verify that this product allows the vehicle to operate within legal emissions standards and is therefore legal to be sold for on-street use in all states that accept the legal provisions of the Clean Air Act and EPA’s Anti-Tampering Policy.

NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY EMISSION CONTROLLED MOTOR VEHICLE.

Testing with the California Air Resources Board, in order to achieve 50-state compliance, is pending. Once testing is complete with California, and an EO number is issued, this product will be updated to 50-state legal status.