My TTR oil plug was a NIGHTMARE to get out. When the dust all settled it was ruined. I hate the soft metal it was made from so I bought a plug at my auto store. It was really nice, solid steel and 17mm BUT it was about a 1/4inch longer. I was concerned about the extra length (thats what she said) hitting something up there. I didnt notice anything hitting. I dont know whats up there. Can anyone tell me if I should be concerned? thank you.