High-flow downpipe from Armytrix dedicated to BMW 1 F40 M135i OPF.
The component is made of stainless steel coated with a ceramic layer. The downpipe removes the factory catalytic converter.
Modifying the front part of the exhaust significantly reduces back pressure. This translates to an increase in the car's power and a much more aggressive sound.
Armytrix downpipes are sold with a system that eliminates errors in the engine control unit.
