I find Hyundai / Kia engine air filters are robust and seal extremely well as compared to STP and other after market engine air filters I have tried . I don't pay dealer prices but buy from a trusted on-line Hyundai / Kia provider. Yes , if I could find an after market air filter built as well and sealed as well as the Hyundai / Kia engine air filters then I would change my tune . For me it only took one after market engine air filter that did not seal well plus a high silicone UOA to stay with what works (for me) .