No, the O rings are not included. The top and bottom are different size. I also tore a bottom ring in my installation, so I ordered replacement overnight from st charles isuzu. Since they only showed one part #, the parts guy and I figured that the cost $8 was for the whole set of 12 O rings.

Only 1 ring is covered by that part#, lucky for me it was the bottom one I needed.

Neoprene O rings won't work for long since they are damaged by gasoline, the rings need to be nitrile rubber.

John C.