Muffler set (sus φ80x4tip)
Part no.: 4101-19214
Application: E92 320i / N43B20A
Discription:

Material: stainless steel（SUS304）
Main pipe: φ50.8mm
Tail pipe: φ80mm / 4 tip
Contents: rear silencer
Installation: needs to cut factory exhaust and rear bumper. (not come with diffuser on the picture)
Control valve: not available

Approved: JASMA (Meet Japanese standard)

Noise level for reference
(It might be different depending on the condition)
80dB at 5025 rpm