The flutter won't happen if the box is completely fitted. Sometimes when you put it on, there's a space (tiny) between the front snorkle and inner bend where the airbox meet that the grove isn't clicked in. You'll see that the box has a very small groove for this purpose, but it's trickly to lock it in perfectly.
| AWE NR | SWIFT SPEC-R| IND BSM PK. | BMS Module |