181-00855 Exhaust System F826tb for F80/82-M3/M4

Applicable Models
BMW F80-M3
BMW F82-M4

181-00855-VT
Exhaust System F826tb (Not compliant with vehicle inspections)

It also performs well when boosted up.
The rear silencer has a straight structure that reduces exhaust resistance even at high RPMs. It is smooth regardless of whether the flap is open or closed, and contributes greatly to performance.
Layout
Middle pipe, rear silencer
Main Pipe
D=70mm x 2
Material: Stainless steel SUS436
silencer
Material: Stainless steel SUS304
Sub-silencer x 2
Rear silencer x 2
Finisher
D=90mm x 4
Material: Titanium (anodized)
exhaust flap
D=70mm x 2
The genuine actuator is reused.

Exhaust noise (flap: closed)
Cold start 93dB
Idling 66dB
Proximity exhaust noise 87dB

Exhaust noise (flap open)
5500rpm 101dB

185-00871
Down pipe (not compliant with vehicle inspection)

If you are looking for performance, a downpipe is an essential item.