I Recently installed a TRD intake on my wifes 2019 Limited 4runner. (Yes, it fits just fine.) I first ran through the gears with the windows down, then with the windows up. Finally, I was racing my brother in his 2019 XP900 Ranger. Overall, its a fairly quite. Only really noticeable at full throttle. My wife reports it feels like it has a bit more "get up and go." We'll see on the fuel mileage..