4.6L 2V & 4V /3.8L/2.3L N/A and turbocharged Denso Iridium
1 heat range colder than stock for most applications. 14mmX.708" reach tapered seat. A must for any turbochargered or supercharged engine. Stop the mis fire and get your complete spark and improve its intensity.
This plug is a must for all you circle track racers. If you don't have them your competition does.