Atmospheric/divorced Wastegates
A "divorced" wastegate dumps the gases directly into the atmosphere, instead of returning them with the rest of an engine's exhaust. This is done to prevent turbulence to the exhaust flow and reduce total back pressure in the exhaust system. A Divorced wastegate dumper pipe is commonly referred to as a Screamer Pipe due to the unmuffled waste exhaust gases and the associated loud noises they produce.
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