NGK Iridium IX Spark Plug LFR7AIX # 2309 PK4

I checked the plug gaps. Found them all to be about 0.5mm. Opened them up to required 1.1mm. Then thought this doesn't appear to be correct. Spark plugs shouldnt need adjusting, certainly not by 50%. Didnt trust them, threw them away. Came up as suitable for my car on amazon. Waste of money and time.

Fell kauf passt nicht und schade

These were perfect for my Subaru STI 2018 it actually feel a better performance of the engine

The NGK Iridium IX Spark Plug is a standout performer in the world of automotive maintenance. The first thing that strikes you is the build quality. These spark plugs exude durability and precision engineering. The use of iridium in the electrode ensures excellent longevity and consistent performance over the long haul. I've found that they easily outlast conventional copper or platinum plugs, making them a cost-effective choice in the long run. Installation is a breeze, thanks to the well-crafted design. The hexagonal nut at the top of the plug simplifies removal and installation, even in tight engine spaces. I appreciate the ease with which these plugs fit into various vehicle models. When it comes to performance, NGK's Iridium IX Spark Plugs shine. They offer excellent ignition efficiency, resulting in smoother idling, improved fuel efficiency, and reduced emissions. I've noticed a noticeable boost in engine responsiveness and power delivery after switching to these plugs. Whether you have a daily driver or a high-performance vehicle, these spark plugs can make a significant difference. One more noteworthy feature is their ability to resist fouling and carbon buildup. I've experienced fewer misfires and less maintenance hassle since using NGK Iridium IX Spark Plugs. While they might come at a slightly higher price point compared to standard spark plugs, the enhanced performance and extended lifespan make them a worthwhile investment. If you're looking to optimize your engine's performance and reliability, these spark plugs are an excellent choice. In summary, NGK Iridium IX Spark Plugs are a top-notch option for automotive enthusiasts and anyone looking to improve their vehicle's performance and longevity. Their quality, ease of installation, and impressive results make them a standout choice in the spark plug market. Will continue to purchase!

I have them installed in my 2005 STI. I've ran these One Step Colder plugs for over 15 years on my STI. Just something I've always ran with my custom pro-tune, these are perfect! I was a bit worried with some of the reviews stating these were fake NGK's. However, not the case. The plugs are working, no issues and I verified them to be the real deal.