New APR for your B9 S4
APR performance products for the Audi B9 S4 are engineered to unlock the full potential of the turbocharged 3.0T V6 engine while preserving the reliability, refinement, and everyday drivability expected from Audi's sport sedan platform. The product lineup includes ECU and TCU tuning, high-flow intake systems, intercoolers, exhaust upgrades, suspension components, and supporting performance hardware, all designed for precise fitment and seamless integration. Through extensive engineering and testing, APR upgrades deliver increased horsepower and torque, improved throttle response, optimized power delivery, and enhanced driving dynamics, allowing B9 S4 owners to experience a more exciting and capable vehicle on both the street and the track.
Experience a more exciting and capable vehicle
for your B9 S4
Only available for purchase in the United States and Canada.
This upgrade must be performed at ECS Tuning's facility in Ohio.
This upgrade requires the vehicle to be dropped off at ECS Tuning's facility in Ohio and picked up the ne
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Ships on Sep 1, 2026
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