Maintaining and improving your engine performance requires 3 components: Spark, fuel and air. The easiest way to get more performance out of your engine is by helping it breathe better with some simple bolt-ons like air filters and exhausts. A clean performance air filter or cold air intake system can improve the responsiveness, fuel efficiency and also peak horsepower and torque of your car or truck. Vehicle air filters come in different configurations and price points - so research and talk with an air filter specialist to find one that suits your needs. Modern truck and car air filters come with dozens of accessories to improve and maintain your air filter - read on below for in-depth review of car and truck air filters. Check out our Air Filter Car Buying Guide
Not sure which 2004 BMW Z4 Air Filters are right for you? We have over 14810 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"My only comment is that the filter did not fit as good in the top of the housing as the OEM filter it replaced. That said a little bit of tweaking made it fit ok and was possible to close the lid correctly. I have been driving with the filter for about one month+, and the car runs great. It might or might not have a few more horses, can't tell." —Ole T from Palmdale, CA bought a K&N Air Filters for a 2004 BMW Z4, 3.0L 6-cyl. engine.
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