Fi EXHAUST BMW F20 M135i Cat-back

Fi Exhaust develops performance exhausts with Valvetronic technology to alter the exhaust flow path and sound intensity. Closed valves route gases through the silencer, while opening them produces a more pronounced soundtrack.

Selected applications are available in the lightweight Signature titanium range. Control may use factory driving modes or an optional Fi Pro module, so the configuration should be matched to the vehicle and selected system.

For example, the Fi Exhaust range for the BMW G20/G21 M340i offers a quad-tip layout or a version compatible with the original tailpipe appearance. Both use two valves even though the factory system has a single valve motor. For this application, the manufacturer supplies an additional motor and the required wiring, combining the styling choice with matched exhaust control.

History and development. Frequency Intelligent Exhaust was established in Taipei in February 2012. Its first collection, covering vehicles including the Porsche 911 Carrera, BMW E92 M3 and Audi R8, arrived in 2013. International shipping and cooperation with Germany’s PP-Performance also began that year.

The business today. The brand now serves international sports-car and supercar markets with exhaust systems and electronic controls. Its 2026 communications also emphasise personalised finishes, including laser-engraved tips and custom badges. Development therefore encompasses new applications as well as individualisation of existing products.