FI Exhaust Valvetronic Cat-Back System For Audi S4 / S5 (B9) 2018-2024 Drivetrain>Differential Spider Gears Hummer: H2 08 - 09

Hummer: H2 08 - 09 6

BMW's S63 Twin-Turbo V8 is a tried and true power plant capable of big numbers

5 Air Temp Sensor (inc plug & pins)

Exhaust kit 15666 features a cat-back layout that replaces your ride's stock exhaust components from near the catalytic converter on back

Our specially designed O2 sensor and wiring harness are included for ease of installation

FI Exhaust Valvetronic Cat-Back System For Audi S4 / S5 (B9) 2018-2024 Drivetrain>Differential Spider Gears Hummer: H2 08 - 09Audi B9 S4 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 5 10% after installing a full