Valvetronic Cat-Back Exhaust System for Mercedes-Benz W213

The Fi Exhaust Valvetronic cat-back exhaust system is meticulously engineered for the Mercedes-Benz W213 E63/E63S models equipped with the 4.0TT M177 engine, covering the 2017-2023 model years. Constructed from premium T304 stainless steel, this direct bolt-on exhaust package includes a front pipe, a mid X-pipe, and a Valvetronic muffler. The valvetronic technology integrated into the muffler allows for precise control over airflow and sound, directly impacting the vehicle's overall performance and torque output. Fi Exhaust claims that a full catless system, featuring this valvetronic catback and an ultra-high flow downpipe, can result in average horsepower gains of 5-10%. This system offers a dual personality in its sound delivery. When the valves are closed, exhaust gases are routed through the muffler, maintaining a comfortable and subdued tone for low-profile cruising. However, opening the valves unleashes an intense, sporty soundtrack that amplifies the driving experience. Transitions between street and race modes are seamless, controllable via factory exhaust/sport buttons, drive modes, or an optional Fi Pro remote control upgrade. It is important to note that while product images may display downpipes/headers, these components are not included with the catback exhaust system purchase and must be acquired separately. Availability can also vary based on specific car models and exhaust setups; consultation with a representative is advised for confirmation. The unique sound and performance characteristics are attributed to meticulously designed muffler internals tailored specifically for the W213 E63/E63S.