I installed this on my 2018 JKU Rubicon as the Jeep dealer suggested it would make up for the large tire difference in mileage and horsepower. I have to say it sounds good. Even hoarser, neighbors can't hear you walking down the street. I'm really not sure if it made a huge difference in performance since I changed it at the same time as the tires (changed from 255 to 35). My intuition tells me that the jeep has been making this motor for years and it was probably tuned to an air filter etc. That the air intake might not change significantly for 2018. But maybe it would have been different with the older one. Anyway I like it. Sounds good, looks great under the hood and is very easy to install. Have fun jeep driving :-)
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