For that extra burst of power when you need it most, you can count on DENSO to harness the power of iridium to dramatically increase firing performance. The result is maximum horsepower and torque. 1999-2004 Ford F-350 Super Duty 6.8L V10.
I have gotten 4 seasons use from the same Denso Iridium plugs on my twin engine Formula boat compared to using regular plugs that had to be changed every season.