--- product_id: 27237536 title: "NGK (4218-4PK Iridium IX Spark Plug, (Box of 4)" brand: "ngk" price: "$66.57" currency: USD in_stock: true reviews_count: 13 category: "Ngk" url: https://www.desertcart.us/products/27237536-ngk-4218-4pk-iridium-ix-spark-plug-box-of-4 store_origin: US region: United States of America --- # Tapered ground electrode reduces quenching 0.6mm laser-welded iridium tip Triple gasket seal for zero gas leaks NGK (4218-4PK Iridium IX Spark Plug, (Box of 4) **Brand:** ngk **Price:** $66.57 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your drive with NGK Iridium IX – where precision meets power! ## Quick Answers - **What is this?** NGK (4218-4PK Iridium IX Spark Plug, (Box of 4) by ngk - **How much does it cost?** $66.57 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/27237536-ngk-4218-4pk-iridium-ix-spark-plug-box-of-4) ## 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 - • **Durability That Lasts:** Iridium alloy’s ultra-high melting point ensures superior heat resistance and longevity, outlasting standard plugs. - • **Leak-Proof Combustion:** Triple gasket seal eliminates combustion gas leakage, maximizing efficiency and throttle response. - • **Precision Ignition Power:** Fine 0.6mm iridium tip delivers extreme ignitability and consistent spark for peak engine performance. - • **Corrosion & Seize Resistant:** Trivalent metal plating protects against corrosion and seizing, ensuring hassle-free maintenance. - • **Fouling & Flashover Defense:** Longer insulator nose and corrugated ribs prevent fouling and flashover, keeping your engine running clean. ## Overview NGK Iridium IX Spark Plugs feature a laser-welded 0.6mm iridium tip for unmatched durability and stable ignition. Designed with a longer insulator nose and corrugated ribs to prevent fouling and flashover, plus a triple gasket seal to eliminate combustion gas leaks. Engineered in Japan for high-performance vehicles, these plugs deliver improved throttle response, extreme ignitability, and superior corrosion resistance, making them the trusted choice for enthusiasts seeking reliable, long-lasting spark plugs. ## Description Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling. The 0. 6 millimeter laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect. Longer insulator nose prevents fouling, the corrugated ribs on insulator prevent flashover, and a triple gasket seal eliminates combustion gas leakage. Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high performance engines. Trivalent metal plating - superior anti-corrosion and anti-seizing properties. Review: genuine - I read a lot of stories saying there is a high chance to get a fake spark plugs if you're buying from desertcart and the likes. Got me somewhat worrying and curios, and so I went to an auto parts store and bought the same set of plugs. Guess what -- the set from the parts store is exactly the same as the one from desertcart. It looks exactly the same, all the dimensions are identical, the weight is the same, the resistance is the same. I have replaced a set which was installed 3 years ago and did 25000 miles on my Yamaha FJR1300, and it did not really need to be replaced. Review: Authentic ngk - Long lasting performance ## Features - Package Dimensions: 3.43 L x 0.89 H x 0.98 W (inches) - Package Weight : 0.07 pounds - Made in Japan - Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000BYERAO | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #1,055,614 in Automotive ( See Top 100 in Automotive ) #5,608 in Automotive Replacement Spark Plugs | | Brand Name | NGK | | Compatible with Vehicle Type | Car, Truck | | Core Material | Platinum | | Customer Reviews | 4.5 4.5 out of 5 stars (208) | | Global Trade Identification Number | 00087295042182 | | Included Components | Automotive accessories, Underwood parts, Performance Parts | | Item Type Name | Iridium Ix Spark Plug | | Item Weight | 1.12 ounces | | Manufacturer | NGK | | Manufacturer Part Number | CR8EIX | | Manufacturer Warranty Description | Manufacturer Warranty | | Model Number | CR8EIX 4218 | | OEM Equivalent Part Number | 297 921 | | Thread Size | 8mm | | Top Material Type | Metal | | Unit Count | 4.0 Count | ## Product Details - **Brand:** NGK - **Core Material:** Platinum - **Thread Size:** 8mm - **Top Material Type:** Metal - **Vehicle Service Type:** Car, Truck ## Images ![NGK (4218-4PK Iridium IX Spark Plug, (Box of 4) - Image 1](https://m.media-amazon.com/images/I/51VBHvGpzpL.jpg) ![NGK (4218-4PK Iridium IX Spark Plug, (Box of 4) - Image 2](https://m.media-amazon.com/images/I/61+7o8GfWyL.jpg) ![NGK (4218-4PK Iridium IX Spark Plug, (Box of 4) - Image 3](https://m.media-amazon.com/images/I/61ZBKklngUL.jpg) ![NGK (4218-4PK Iridium IX Spark Plug, (Box of 4) - Image 4](https://m.media-amazon.com/images/I/71kk8a9L30L.jpg) ![NGK (4218-4PK Iridium IX Spark Plug, (Box of 4) - Image 5](https://m.media-amazon.com/images/I/714Gxh9LA2L.jpg) ## Questions & Answers **Q: Work with a Yamaha wr450f?** A: no it does not , the best way to check what plug fits your application visit , www.ngk.com . hopefully this helps **Q: right plug for a 2014 yamaha fjr es???** A: Sure. Cut 4 threads off first. **Q: Will this fit a 50cc 4 stroke pocket bike?** A: No **Q: Will this work on a 2004 Yamaha yz450f?** A: Yes this will work in your YZ450F ## Customer Reviews ### ⭐⭐⭐⭐⭐ genuine *by K***N on February 22, 2021* I read a lot of stories saying there is a high chance to get a fake spark plugs if you're buying from Amazon and the likes. Got me somewhat worrying and curios, and so I went to an auto parts store and bought the same set of plugs. Guess what -- the set from the parts store is exactly the same as the one from Amazon. It looks exactly the same, all the dimensions are identical, the weight is the same, the resistance is the same. I have replaced a set which was installed 3 years ago and did 25000 miles on my Yamaha FJR1300, and it did not really need to be replaced. ### ⭐⭐⭐⭐⭐ Authentic ngk *by G***L on May 1, 2024* Long lasting performance ### ⭐⭐⭐⭐⭐ I purchased BN 2016 Suzuki Burgman 650 in September 2016 ... *by P***B on August 14, 2017* I purchased BN 2016 Suzuki Burgman 650 in September 2016. Now, she has 14000 miles on the dash. Yes, it is time to replace the plugs. I considered 2 options; standard plugs (CR8) and Iridium (CR8EIX). My local auto part stores sells the standards for $10 a pop. Then, I see this set of 4 for a lot lower price/plug. I don't know much about IRIDIUM plugs but it helps my bike's idling and accelerating when underload. --- ## 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.us/products/27237536-ngk-4218-4pk-iridium-ix-spark-plug-box-of-4](https://www.desertcart.us/products/27237536-ngk-4218-4pk-iridium-ix-spark-plug-box-of-4) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-04-26*