Subaru Legacy Manuals 2010 Legacy Owner's Manual | Page 360

11-22 Maintenance and service ! Turbo models 3. Clean the inside of the air cleaner cover and case with a damp cloth and install a new air cleaner element. 4. Snap the two clamps on the air cleaner case cover. Spark plugs It may be difficult to replace the spark plugs. It is recommended that you have the spark plugs replaced by your SUBARU dealer. The spark plugs should be replaced according to the maintenance schedule in the “Warranty and Maintenance Booklet”. & Recommended spark plugs 1. Unsnap the two clamps holding the air cleaner case cover. 2. Open the air cleaner case cover and remove the air cleaner element. 2.5 L non-turbo models: SIFR6A11 (NGK) 2.5 L turbo models: SILFR6B8 (NGK) 3.6 L models: SILFR6C11 (NGK)