Changing an air cleaner that’s dirty will undoubtedly improve the performance of your Harley Davidson. It’s going to help to increase the effectiveness and the power of the engine and overall components. However, you need to get a good stage 1 air cleaner to get a good performance from your bike. If you go for a lower-quality option, you are not going to see any improvement at all. That’s why you need to get a good quality air cleaner to get the best results for your Harley Davidson.