Ignitions and Electrical› Ignition Components
NGK
NGK Iridium Spark Plug Box of 4 (LFR7AIX)
SKU: N003 2309
Easy — 1–2 hours
Description
Constructed with a pure alumina silicate ceramic insulator for superior strength and heat transfer, it also includes a copper core for additional heat removal. The trivalent metal plating offers anti-corrosion and anti-seizing properties, while corrugated ribs prevent flashover and triple seals prevent leakage.
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | NGK |
| Part Number | N003 2309 |
Videos
NGK LFR7AIX Iridium IX Spark Plugs Kit 2309 1 Step Colder Subaru Plugs EJ25
NGK WRX One Step Colder Spark Plugs- Whats in the Box?
NGK Spark Plug - One Step Colder Upgrade | Genesis Coupe
Secret Subaru spark plug for more power WRX?STI ej257/ej255
Changing Spark Plugs On My Subaru STI I NGK LFR7AIX
How To Do LEXUS RCF V8 Spark Plug Replacement DIY NGK 2309
NGK 6510 LTR7IX-11 Iridium Spark Plug For MazdaSpeed 3 / Ford Focus ST, Mustang GT & BOSS
Spark Plug Types - NGK Spark Plugs - Tech Video
BPR vs BKR - What is the difference? NGK Iridium Spark Plugs
NGK Spark Plugs @ SixityAuto.com
Top 5 Best Spark Plugs for 5 7 Hemi [Review 2026] - Mopar/Performance & Ngk Spark Plugs for 5 7 Hemi
NGK Understanding Spark Plug Heat Ranges
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy