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 a significant strain on the engine; tuning to increase engine power exacerbates this stress, raising concerns about catalytic converter melting or 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 illuminates when the lambda sensor on the monitoring side is functioning.
・Avoid starting the engine in poorly ventilated areas.
・Not approved for vehicle inspection / Competition parts (Japan)