Review on 🔧 K&N Engine Air Filter: Premium, High Performance, Washable Replacement Filter for 2015-2019 Ford Mustang L4/V6/V8, 33-5029 by Paul Beach

I bought this filter for my 18 year old GT with no expectations of a performance boost, just an alternative to disposable paper filters. Without changing my driving style at all, on the next fill-up I went from my usual 25mpg to a solid average of 26mpg and over 27mpg if I counted just highway traffic! I am absolutely blown away that a V8 engine can be so efficient. Just note that 95% of my trips consist of doing 80 miles round trip at 70 mph in 10th gear. I have an aftermarket Rousch exhaust system, so I didn't notice a difference in tone, nor much of a difference in throttle response.