A quick how to of an 06-07 Subaru Tribeca B9 spark plug change.
Threw together a couple clips on the plug change. Wish it was a little better with all going on around me at the time, but hope it helps. Also there are various way of removal and this is the way I favor, but yours might suit you better. Your looking around 20ish minutes a side. Don't forget copper anti-seize (spark plug threads) and die-electric grease (coil boots). Also check the gap to make sure it's correct! If you get Iridium IX and the gap is not correct you can adjust it using only the ground electrode only (caution needs to be taken adjusting)!