NGK Iridium IX LFR7AIX Spark Plugs (Set of 16) (2009+ 5.7L VVT, 2015+ 6.2L HEMI)
NGK Iridium IX LFR7AIX Spark Plugs (Set of 16) — Premium iridium spark plugs engineered for 2009+ 5.7L VVT and 2015+ 6.2L HEMI engines.
Price:
$135.00
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.
- NGK Part Number: LFR7AIX
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
NOTE: Use of nitrous with boost may require smaller plug gaps.
| Brand | NGK Spark Plugs |
|---|---|
| NGK Part Number | LFR7AIX |
| Thread Diameter | 14mm |
| Thread Pitch | 1.25mm |
| Seat Type | Gasket |
| Reach | 26.5mm (1.04") |
| Hex Size | 5/8" (16mm) |
| Terminal Type | Solid |
| Gap | .031" (0.8mm) |
| Center Electrode Material | Iridium |
| Center Electrode Type | Fine Wire |
| Center Electrode Size | 0.6mm |
| Center Electrode Projection | Projected |
| Ground Electrode Material | Nickel |
| Ground Electrode Type | Standard |
| Ground Electrode Shape | Taper Cut |
| Ground Electrode Quantity | 1 |
| Resistor | Yes |
| Resistor Value | 5k Ohm |
| Heat Range | 7 |
| Torque Specs | Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft. |
| Longevity | 50k Miles |
| Shorty Spark Plug | No |
| Electrode Core Material | Copper |
| Electrode Tip Material | Iridium |
| Insulator Type | Projected |
Warranty
60 Days
| Make | Model | Engine | Year |
|---|---|---|---|
| Chrysler | 300 | 5.7 | 2011 - 2023 |
| Chrysler | 300C | 5.7 | 2009 - 2010 |
| Chrysler | Aspen | 5.7 | 2009 |
| Dodge | Challenger | 5.7 | 2009 - 2023 |
| Dodge | Challenger | 6.2 | 2015 - 2023 |
| Dodge | Charger | 5.7 | 2009 - 2023 |
| Dodge | Durango | 5.7 | 2011 - 2024 |
| Dodge | Durango | 6.2 | 2021 - 2024 |
| Dodge | Ram 1500 | 5.7 | 2009 - 2010 |
| Dodge | Ram 2500 | 5.7 | 2009 - 2010 |
| Dodge | Ram 3500 | 5.7 | 2009 - 2010 |
| Jeep | Commander | 5.7 | 2009 - 2010 |
| Jeep | Grand Cherokee | 5.7 | 2009 - 2021 |
| Jeep | Grand Cherokee | 6.2 | 2018 - 2021 |
| Jeep | Wagoneer | 5.7 | 2022 - 2026 |
| Ram | 1500 | 5.7 | 2011 - 2024 |
| Ram | 1500 | 6.2 | 2021 - 2024 |
| Ram | 2500 | 5.7 | 2011 - 2024 |
| Ram | 3500 | 5.7 | 2011 - 2024 |
