Great write up; it was a nice guide to have during this procedure. My wife's 2011 JK Wrangler 3.8 was a bit overdue....182K miles. Had to use a breaker bar on the 3 driver side. The front 2 on the passenger side weren't to hard to reach but the rear one was easy once I removed the flare. Didn't have use a swivel on any and stood on the bumper to reach behind the engine and guide wires. I bought the plastic wire tray based on the advice given but alas, the old one came out intact...so I put the new on in anyway. After removing the wires, I placed a shop vac over the plug to suck out anything and heard some rattling around #4. After pulling the plug, I saw half the ceramic cracked off. All plugs had gaps opened beyond 1mm and electrodes worn to nubs but dang...it didn't really run that bad so kudos to Jeep and Champion plugs. The first thing I noticed on the test drive was how quicker it accelerates. I'll wait for the Mrs to give me the MPG feedback.