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When the valves are closed
Different exhaust parts are offered depending on the vehicle version
Audi B9 S5 (Non Sport Diff Vehicles Only) Fi Exhaust (Frequency Intelligent Exhaust) high-performance valvetronic exhaust system is direct replacement bolt on system manufactured out of a high-grade T304 stainless steel that offers an exhilarating soundtrack
The famous EA888 engine is now at its 3rd generation and continues to be one of the 2
Audi S4/S5 3.0T B9 Fi Original Exhaust System Audi-A4-2017 When the valves are closedAudi B9 S5 (Non Sport Diff Vehicles Only) Fi Exhaust (Frequency Intelligent Exhaust) high performance valvetronic exhaust system is direct replacement bolt on system manufactured out of a high grade T304 stainless steel that offers an exhilarating soundtrack. The Fi EXHAUST system is designed with a valvetronic technology to control airflow, sound volume and enhance the overall performance and torque. On average horsepower is expected to increase from
