Spark Plug, Iridium IX, Gasket Seat, 14mm Thread, 1.043 in. Reach, Projected Tip, Resistor, Each

Fits: 2009+ 5.7L VVT, 2015+ 6.2L HEMI

These NGK Iridium IX spark plugs feature an ultra-fine center electrode that's designed just thick enough to ensure the maximum durability and life of the spark plugs, and just thin enough to create an accurate and consistent spark. They represent the ultimate evolution of spark plug technology and performance. Iridium is significantly stronger than any metal used in spark plugs today. It's the hardest metal used (in fact, iridium is 6 times harder than platinum), which has allowed NGK engineers to reduce the voltage requirement for a spark.

Features:

Shorty Spark Plug: No

Resistor: Yes

Manufacturer Heat Range: 7

Electrode Core Material: Copper

Electrode Tip Material: Iridium

Insulator Type: Projected

Spark Plug Thread Size: 14mm

Spark Plug Reach: 1.043 in.

Spark Plug Seat Style: Gasket

Wrench Diameter: 5/8 in.

Recommended Gap Size vs Boost with factory HEMI coilpacks:

0.029" for stock boost level

0.027" for 15psi

0.024" for 18 psi

0.022" for 20psi

0.020" for 22psi

0.018" for 24psi