Spark Plugs

[smythie]

Not in the Gen 4 - the engine sits down between the chassis rails hindering access to the plugs. Not super hard but not a half hour job for the 4 plugs. 2-3 hours for your H6 without lifting/lowering the donk fwiw

[Robbks]

Early GT forester was the same as it has chassis spacers, so the engine sat down in the rails
easy to do with the correct tools
like this

[tkboi]

hey guys, just wondering would ILFR6B spark plug number be the same for the 2.5is?

[maj]

Checking my 200k service sheet, Subaru put NGK ILFR6 Laser Iridiums into my '05 GT and looking at the service lifetime schedule, these are replaced every 50,000kms.

I've never asked for "upgraded" plugs so it's possible these are now the recommended plugs? Price is around $100 for all 4 plugs.

Also looking on the service lifetime schedule, NA plugs are replaced every 100,000kms. No idea if it's the same plug.