Review on Enhanced Performance: High Performance 8-Pack Straight Boot Ignition Coils for Ford F-150, Lincoln, and Mercury V8 V10 - 15% More Energy - DG511 C1541 FD508-Upgrade (RED) by Michael Tran

Replaced original coils on my wife's 2007 F150 truck 5.4 liter engine was only missing one cylinder but had over 150,000 miles on it so I decided to get them all exchange. Wow, should have done this much earlier, not for obvious maintenance reasons, but because they run a week but don't break down. I forgot how well this truck can work. I'm so glad I didn't pay that ridiculous Original Equipment price that others wanted. Every now and then you give yourself a break, this is one of them.