Applicable models
BMW F87-M2 (N55 Engine)

181-02211-RT/VT
Exhaust System F876tb

Performance for increased boost.
Focus on the rear silencer: Exhaust air passes through the exhaust even when the flap is open, so the load is applied regardless of whether the flap is open or closed. The rear silencer is constructed with low exhaust resistance, contributing greatly to smoothness and performance.
Layout
Middle Pipe, Rear Silencer
Main Pipe
D=80mm , 60-70mm x 2
Material: Stainless steel SUS436
Rear Silencer
Material: Stainless steel SUS304
Finisher
D=90mm x 4
Titanium (purple) anodized
Titanium (polished)
Exhaust Flap
BMWLinked to DME
D=70mm x 2
2 stock actuators (1 additional stock)
1 harness kit
* Above included
SPORT
Not for inspection
Exhaust noise (reference values)
76dB Cold start (flap closed)
58dB Idling (flap closed)
85dB Close exhaust noise (flap closed)
102dB Proximity exhaust noise (flap open)