On Sun Jun 24 18:26 , Btlifes2short@aol.com sent: . Today I changed the Racor 900 filters on my main engines, and the new filters have the same indentation as the new 500 filters. Do the Racor 900's also need the bushing to be installed in the housing, are are they OK as is? (endsnip) It is my understanding that the only model that needs the bushing is the 500 series. You could probably check the Racor website, or just call them, however it should be easy to check it out yourself. Pull the top off the filter housing and note how high the old style filter you've been using sits, then drop a new style in and see if it changes. If not, you're good to go. I bet you'lll find your fine without the bushing. I talked to a Racor rep at the Workboat Show in New Orleans this Spring and ask him about the bushing thing. The only filter he mentioned in relation to the bushing thing was the 500. Now, I didn't specifically ask about the other series filters, but he didn't include them either. Brent Hodges 43 Albin with Racor 500's...........and new bushings............. Seabrook, Tx.