Review on K&N Engine Air Filter: High Performance Replacement for 2017-2019 Hyundai/Kia L3/L4 Models, Washable & Premium Filter (Elanta, i30, Kona, Veloster, Cee d, Forte), 33-5050 by Kevin Parker

Wow. It's worth it. My 2017 HYUNDAI Elantra works great now. I only use 97 octane (high octane really helps). The owner's manual recommends using injector cleaner regularly, which I do. I check the oil level regularly. I have never bought a K&N filter; but I will buy it for future purchases. Update: I've been using this filter for 1 month now. It is great. My Hyundai has an automatic transmission. The increase in performance is very noticeable. I've noticed that the power gain is most noticeable between 3rd and 6th gear. ** I repeat, use 93 octane for best performance. High speed driving is NOT my thing. But I notice that when accelerating to highway speeds, the car now smoothly reaches higher speeds. In addition, acceleration improves when overtaking in the left lane. My gas consumption is also better.