
Just put them in my Range Rover and see if the gas mileage increases. The Range Rover Sport is a 5.0 V8 engine that really can hit the highway. Replace paper filters that are only a year old. I noticed that the papers don't let you see the sunlight as they are quite opaque, but the K&N shows a lot of sun. It is therefore possible that the cotton/oil treatment allows more air to get inside. They're not as thick as paper, but they stick well. Looks very high quality.

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