H&K filter cleaning kit that you canbgetbat pretty much any auto shop. They also say every 50K miles. It having dirt and such in it is supposed to make it "better" at filtering.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Mustang Evolution Forum
2.1M posts
50.9K members
Since 2003
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, horsepower, modifications, troubleshooting, racing, and more!