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X-Drive models
With the help of additional air guides
when the ECU sees these lower and consistently lower temperatures it will operate the engine in its higher power modes for longer - maintaining performance
The S54 engine responds well to the right type of ECU software
Cobra Sport Sports Cat Downpipe Performance Exhaust - BMW 340i (F30 LCI/F31 LCI) (2017-19) SL-AMG (R129) X-Drive modelsThis BMW M340i performance exhaust is made in 3. 5" 88. 9mm pipework and fits from the turbo to the centre exhaust to replace the standard catalyst. The de cat exhaust version is sold for motorsport and off road use only worldwide. The sports catalyst version replaces a factory emissions device and is not EC homologated. This may not meet current emission laws for road use in your territory. All relevant fittings and gaskets are supplied EML lights