The original part has broken twice for me now over two different cars. The only part to fail other than the wing, but the PETG replacement holds up well.

Replace the original by unscrewing it, this is easier if you remove the two screws at the top of the shocks to take it apart completely.

Print on its side for strength, supports will be needed. Go for a shock-resistant filament like PETG and up the wall count.

Made for Eachine EC30 but to the best of my knowledge, it will also fit HBX 16889 shocks.