I recently ordered the NGK (6510) LTR7IX-11 spark plugs for my 2016. I took them out of the package and noticed that they don’t have crush washers. Looking at other spark plugs For my car it seems like none of them do. Is that a thing with the 1.6 Ecoboost engine? I’ve never had a vehicle that had spark plugs not come with crush washers and I just wanted to double check I didn’t order the wrong plugs somehow. Thanks in advance