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 1999 BMW 3-Series 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:
"I received a marked improvement in the responsiveness of my BMW immediately after installing the K&N. Leaving stop lights the car's rear wheels broke loose several times. It was necessary to adjust the way I accelerated the car to avoid this from happening. The car had never done that before. Highway 0-60 has improved also. It has given new life to an old car.
Wish I'd put the K&N filter in years ago." —K. David H from Alamo, CA bought a K&N Air Filters for a 1999 BMW 3-Series, 323iS, 2.5L 6-cyl. engine.
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