Nah its super easy. The Zetec I'm sure just had plugs on wires that went to a coil, but the duratec has the coil pack right on the plug. Its not a true coil-on-plug system but it is the next best thing.
You'll need a 10mm socket to take off the coils and I think its a 16mm deep socket to remove the spark plugs.
Make sure the plugs are gapped correctly (0.50-0.55), work when the engine is cold and do not over-torque the spark plugs when you put in the new ones. I'm sure you know to use white lithium grease on the boots and anti-seize on the threads.
2011 SES 5spd #006 >> SR #213
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