185-00871 LAPTORR EXHAUST down pipe for S55

185-00871
downpipe(Catalyst-less)

Applicable model
BMW F87-M2 Competition (S55 engine)
BMW F80-M3 (S55 ENGINE)
BMW F82-M4 (S55 ENGINE)
　
It is a straight type without the first catalyst located just after the turbine.
The stock catalyst is very harsh on the engine environment because the exhaust pressure is at its highest point, and tuning to increase engine power increases harshness and may cause the catalyst to melt or knock. The straight type downpipe lowers exhaust pressure, improves exhaust passage, and greatly reduces the load on the engine.

Catalyst-less
・Warning lights up when the monitoring side lambda sensor is functioning.
Avoid starting the engine in areas with inadequate ventilation.
Not for vehicle inspection/competition parts (Japan)