185-00871 LAPTORR EXHAUST Downpipe for S55

185-00871
Downpipe(Catalyst-free)

Applicable Models
BMW F87-M2 Competition (S55 engine)
BMW F80 M3 (S55 engine)
BMW F82-M4 (S55 engine)
　
This is a straight-through type with the first catalytic converter, located immediately after the turbine, removed.
Since the stock catalytic converter is located where exhaust pressure is highest, it places extreme stress on the engine; tuning to increase engine power further exacerbates these conditions, raising concerns about catalytic converter melting and the occurrence of knocking. A straight-type downpipe reduces exhaust pressure, improves exhaust flow, and significantly reduces the load on the engine.

Catalyst-Free
・The warning light comes on when the monitoring lambda sensor is functioning.
・Avoid starting the engine in areas with insufficient ventilation.
・Not compliant with vehicle inspection standards / Competition parts (Japan)