Originally Posted by CJM8515

Is that the kit that takes the longer sparkplug? Works well, just you gotta be careful removing the plugs later as I found out lol plug is a different size than the others.

As for 97+ 5.4L:

People have issues when the plugs are changed and not properly done. You must be extra careful putting the plugs in when your done and dont torque them and use motorcraft or similar plugs.Also when pulling your old ones you must let the engine idle for about 20 mins to heat it up and then let cool for 5 and THEN remove the plugs-the AL head expanded and will let the plugs out easy.