AutoCat Set of 8 Ignition Coil Complete for Ford Lincoln Mercury 4.6L 5.4L V8 6.8L V10 DG511 Ignition coils produce the high voltage necessary to ignite the air/fuel mixture in the combustion chamber 8 pcs Pre-Greased/Pre-Tested ignition coil included Built to strict quality control standards,Meet OEM performance requirements,Please verify fitment before purchasing this product Meterials:Coil: Germany made high performance copper Reduces misfire and eliminates hesitation