The aerodynamic piece he was referring to is the air intake, that's imperative to the engine breathing properly, and the black pins, they have a Phillips head screw in them, if u unscrew them, the clips slide in and out. They are called expansion clips.
@@ElantraMansorry to hear man, my 2018 elantra is my baby even though my finance terms are abhorrent. did you file a case with hyundai? they were sued by a bunch of cities so you might be entitled to some money from them