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  1. Armytrix Catback Screeching noise

    Mercedes-Benz CLA45 AMG
    Hi All, My first post here... I have a 2014 CLA45 AMG. Running an ETuners stage 1 ECU tune and an Armytrix Catback system. I have noticed that after the first gear, under full acceleration, I can hear a loud screeching sound from the exhaust with the pops at gear shifts. But if someone listens...
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