Not sure which 2001 Nissan Maxima Air Filters are right for you? We have over 2 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Josh R from Loveland, CO said, "The Injen Hydro Shield is great for wet climates or places where water could get into the engine. It repels water perfectly however this does come at a cost. With the Hydro Shield on the intake it does decrease some of the top end power. It isn't enough to make a big difference but there is a difference. Just weigh the options though. Lose a little power and have a dry engine or have a little more power and risk engine damage."