Eric I considered the 440Source covers but when I talked to them they said it does have a lip on them. I really wanted ones that were just flat with no lip because on my old stock valve covers I had to grind the lip down as it hit on the EZ heads I use. So I went with these from Mancini which have no lip and work perfect for me. Nothing wrong with the 440Source covers that I saw I just did not want a lip on them if I could help it. Ron