This is a very helpful item: A new Oil Filter "O" ring seal for the centrifugal oil filter on the right side of the engine. This is correct 1965-1974 CB450 and CL450 models. Also correct for the CB500T Honda. This is also correct for the Honda CB350, CL350, SL350, CB360, CL360 and CJ360 twin cylinder models. This would also fit the early CB and CL250 twins..but you don't see too many of those. This is a nice seal to replace when doing rebuild or annual main Essential item if you are riding or restoring your vintage Honda. This is not normally included with gasket sets so good to get separate if working on your engine.    We only sell the best!   Top quality aftermarket item. Be sure to check out my current auctions for other vintage M/C stuff now and also in the future for other great stuff. If you need complete engine gasket set or piston rings, or clutch plates for your 450, 500, 350, 360 we have those too on the website. That is it! (OB1)