Muffler(sus φ90x4tip)
Part no:
 4101-32011（stainless）
 4101-32011C（carbon）
Application: G20 320i / 330i B48B20B(Japan spec)
Discription: For M-Sport only

Material: stainless steel（SUS304）
Main pipe: φ80mm (OEM 75mm)
Tail pipe: φ90mm / 4 tip
Contents: Rear silencer
Installation: needs to cut the factory exhaust.

Note:Some OEM parts are required for installation
#51 12 8 069 391 or 3DDesign diffuser
#51 12 8 079 607
#51 71 8 091 107

Control valve: Available.

Approved: JQR (Meet Japanese standard)

Noise level for reference
(It might be different depending on the condition)
89dB at 3750rpm