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Downpipe Kit without catalyst converter for BMW M140i M240i 340i & 440i
made out of high quality stainless steel 1.4301 (SS304)
complete Ø3,5 and adapter for stock exhaust
without catalyst converter
100% perfect fit, replace OEM
less thermal load on the turbocharger
more power by reducing back pressure
significantly more torque
Error display in the DME, because removed catalyst converter.