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 backpressure is highest, it places significant stress on the engine. Tuning to increase engine power exacerbates this stress, raising concerns about catalytic converter melting and the occurrence of knocking. A straight-type downpipe reduces exhaust backpressure, improves exhaust flow, and significantly reduces the load on the engine.


: The warning light comes on when the monitoring lambda sensor is functioning.
・Avoid starting the engine in poorly ventilated areas.
・Not approved for vehicle inspection / Racing parts (Japan)