K&N parts matching Service Champ AF5620 air filter

Just what my car needed.

I installed this filter in my 2008 BMW 528i in under 2 minutes from hood-up to hood-down. After starting the car in the garage I didn't notice any real difference in the sound but once I started driving it I could hear and feel the difference, especially in sport mode. And as an added benefit, it looks like my fuel economy has improved by about 1 mpg. According to the car's computer, in the 1,200 miles since I put it on, my average economy has gone from 25.2 to 26.2 mpg. Very happy.

Wow! What a great product, I felt the difference as soon as I started driving. The filter was a major upgrade and I felt the smoother acceleration right away. I was impressed by the fittment as well, it slid right in. I work in the hospital as the admissions coordinator, so I talk to alot of people and trust me, I will recommend K&N air intake filters to all.