Exhaust system

Part of BMW M4 CSL · about $4,400 to replace

What it is

Twin downpipes, catalysts, resonator and a titanium rear silencer with flaps.

What it does

Carries exhaust gas out, cleans it and shapes the sound.

How it fails

Flap actuators fail in the open position; tips discolour with heat.

Material	Stainless steel, titanium silencer
Spec	Twin 65 mm
	4 × 100 mm tips
	15 kg

Inside this part

Nearby