--- product_id: 261588337 title: "Iridium IX Spark Plug LFR7AIX # 2309 PK4" brand: "ngk" price: "₱4987" currency: PHP in_stock: true reviews_count: 5 category: "Ngk" url: https://www.desertcart.ph/products/261588337-iridium-ix-spark-plug-lfr7aix-2309-pk4 store_origin: PH region: Philippines --- # Superior heat dissipation with copper core Iridium core for ultimate durability Trivalent plating for corrosion resistance Iridium IX Spark Plug LFR7AIX # 2309 PK4 **Brand:** ngk **Price:** ₱4987 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your drive with NGK Iridium – where precision meets power! ## Quick Answers - **What is this?** Iridium IX Spark Plug LFR7AIX # 2309 PK4 by ngk - **How much does it cost?** ₱4987 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/261588337-iridium-ix-spark-plug-lfr7aix-2309-pk4) ## Best For - ngk enthusiasts ## Why This Product - Trusted ngk brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Advanced Heat Management:** Copper core and alumina silicate ceramic insulator work in tandem to optimize heat transfer and prevent overheating. - • **Vehicle-Specific Fitment:** Tailored thread size and gap ensure seamless compatibility with your car or truck for peak performance. - • **Corrosion & Seize Resistant:** Trivalent metal plating ensures your spark plugs stay pristine and easy to service, even in harsh conditions. - • **Flashover Prevention Design:** Corrugated ribs eliminate misfires by preventing electrical flashover, keeping your engine firing clean and strong. - • **Precision Engineered Iridium Core:** Experience unmatched ignition reliability and longevity with NGK’s premium iridium tip. ## Overview NGK Iridium IX Spark Plug LFR7AIX #2309 PK4 is a high-performance automotive spark plug featuring a durable iridium core, copper heat-dissipating center, and corrosion-resistant trivalent plating. Designed with a pure alumina silicate ceramic insulator and corrugated ribs to prevent flashover, it delivers reliable ignition and enhanced engine efficiency. Compatible with specific car and truck models, this 4-pack ensures optimal fit and long-lasting performance. ## Description 4 PCS *NEW* -- NGK 2309 Iridium Spark Plugs LFR7AIX --- Made IN Japan Review: Something isn't right with these sparks plugs. - 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 desertcart. Waste of money and time. Review: inortnung - Fell kauf passt nicht und schade ## Features - Trivalent metal plating provides superior anti-corrosion and anti-seizing properties - Corrugated ribs prevent flashover - Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer - Copper core aids in heat removal ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003RYMPUY | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #37,947 in Automotive ( See Top 100 in Automotive ) #212 in Automotive Performance Spark Plugs | | Brand | NGK | | Brand Name | NGK | | Compatible with Vehicle Type | Car, Truck | | Core Material | Iridium | | Core material | Iridium | | Customer Reviews | 4.6 out of 5 stars 441 Reviews | | Gap Size | 0.04 Inches | | Included Components | 2309 | | Item Weight | 0.01 Ounces | | Manufacturer | NGK | | Manufacturer Part Number | LFR7AIX | | Model Number | 2309 | | Number of Items | 4 | | OEM Equivalent Part Number | FORD%1505812 | | Thread Size | 14mm x 1.25mm | | Thread size | 14mm x 1.25mm | | Top Material Type | iridium | | Top material type | iridium | | UPC | 087295023099 | | Unit Count | 4 Count | | Vehicle service type | Car, Truck | ## Product Details - **Brand:** NGK - **Core material:** Iridium - **Thread size:** 14mm x 1.25mm - **Top material type:** iridium - **Vehicle service type:** Car, Truck ## Images ![Iridium IX Spark Plug LFR7AIX # 2309 PK4 - Image 1](https://m.media-amazon.com/images/I/71hclq6PseL.jpg) ## Questions & Answers **Q: Will these fit a 2009 subaru wrx?** A: Yes these will fit as i also use them in my 2009 wrx. Do not use unless you are at a minimum of 100 hp over stock though as it could hurt performance and fuel economy. These are NOT pre gapped for our Subaru WRX . Take your time and gap these plugs . Do not gap below .024 . I run a built motor and even before that i was pro tuned on both 91,93 and E85. Full bolt ons , headers, fuel pump, intake, hks blow off, blouch 20 G turbo and full 3 in back exhaust. Hybrid speed density . I still run them at .026 gap. Works very well for me. **Q: Will this fit on the 2006 mitsubishi evo 9 mr?** A: Yea **Q: Are these one step colder ?** A: Yes these are 1 heat range colder **Q: Can I return these plugs? They were too long for my Subaru.** A: Sure you can. ## Customer Reviews ### ⭐ Something isn't right with these sparks plugs. *by N***G on 26 May 2020* 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. ### ⭐⭐⭐ inortnung *by A***E on 2 June 2021* Fell kauf passt nicht und schade ### ⭐⭐⭐⭐⭐ I'm happy and my Subaru STi is happy! *by A***X on 28 August 2023* 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! ## Frequently Bought Together - NGK Iridium IX Spark Plug LFR7AIX # 2309 PK4 - MOTUL 8100 X-Cess Gen 2 SAE 5W40 Full Synthetic Motor Engine Oil 5 Liter Bottle - Subaru Engine Oil Filter & Crush Gasket KIT 15208AA100 & 11126AA000 Genuine Legacy Outback Impreza Wrx STi Forester Baja (1 Pack) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ph/products/261588337-iridium-ix-spark-plug-lfr7aix-2309-pk4](https://www.desertcart.ph/products/261588337-iridium-ix-spark-plug-lfr7aix-2309-pk4) --- *Product available on Desertcart Philippines* *Store origin: PH* *Last updated: 2026-08-21*