Great product! Good fit and finish. The top and bottom airbox could have been a better fit. It would be nice if K&N developed a better gasket material to seal this specific area. Easy installation, just follow the instructions. It took me less than 30 minutes with hand tools in the northern Maine winter. Don't forget to disable negative. Battery clamp because after clearing the computer your Ford truck will know where it should be. As advertised, better throttle response and less hesitation. The truck seems to pull harder at higher revs, so a definite power boost! The engine roars when you step on it! i love this sound! As for the mileage. I don't know yet, I haven't traveled much since installing it.
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