Ford Mustang Ecoboost Forum banner


  1. Mustang EcoBoost Maintenance
    hey everybody, first timer here. I just recently installed a MBRP race catback exhaust on my car and a Mishimoto catted downpipe and i’ve been experiencing a strange noise as of lately. when i turn the car on and once it warms up a little bit it develops a “fluttering” noise under the car by the...