Just want to chime in. I have been frustrated by the Bosch 3300. I removed a 3300 that was installed 2 years ago, the new 3300 bottomed out as previous poster noted. The old filter is concave and the new is flat. I called bosch and their "technical" person was of no help saying that he knows of no change to the design and it is not specified for a motorcycle, so basically he wanted nothing to do with me. I will avoid Bosch in the future because of this guy's attitude alone!
