Greetings. I am new to the board and have enjoyed the great info. (I accidentally first posted this question in the “Older Generation” section but have now added it to the proper section) I have a 1997 Outback (2.5) and I am changing the spark plugs. The dealer quoted me $13.60 each for OEM (I am assuming they are NGK) and the local parts store quoted me around $3.00 for NGK. Are there different types of NGK plugs? I have also seen on-line parts retailers quote around $13.00 for the Subaru plugs that they show to be OEM and, again, around $3.00 for non OEM.. Where should I go? Thanks!!!