--- product_id: 471862111 title: "NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/--" brand: "ngk" price: "€ 102.78" currency: EUR in_stock: false reviews_count: 5 category: "Ngk" url: https://www.desertcart.be/products/471862111-ngk-cr9eix-iridium-ix-spark-plug-4-pack store_origin: BE region: Belgium --- # Iridium core for superior ignition 4-pack value bundle Direct OEM replacement fit NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/-- **Brand:** ngk **Price:** € 102.78 **Availability:** ❌ Out of Stock ## Summary > ⚡ Ignite your drive with NGK’s elite spark plugs—because every start counts! ## Quick Answers - **What is this?** NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/-- by ngk - **How much does it cost?** € 102.78 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/471862111-ngk-cr9eix-iridium-ix-spark-plug-4-pack) ## 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:** Engineered for extended lifespan and consistent performance - • **Precision Ignition Power:** Iridium tip ensures faster, more reliable starts every time - • **Value-Packed Convenience:** Four spark plugs in one package—ready to upgrade your ride - • **Trusted Quality Assurance:** Backed by NGK’s 4.8-star rating and genuine manufacturing - • **Seamless OEM Compatibility:** Exact fit for your vehicle, no modifications needed ## Overview The NGK CR9EIX Iridium IX Spark Plug 4-pack offers professional-grade ignition performance with a durable iridium core, ensuring reliable starts and long-lasting engine efficiency. Designed as a direct OEM replacement, these spark plugs fit seamlessly into compatible vehicles, delivering trusted NGK quality backed by excellent customer reviews. ## Description Genuine 4 pack NGK Iridium IX 3521 Spark Plug Review: GOOD PRODUCT Review: Value ## Features - 4 pack NGK Iridium IX 3521 Spark Plug - Genuine NGK Parts - Includes original packaging and hardware - Direct replacement auto parts - Confirm vehicle fitment with desertcart Confirmed Fit ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004SKYAWM | | Brand | NGK | | Brand Name | NGK | | Compatible with Vehicle Type | Car | | Core Material | Iridium | | Country of Origin | Hong Kong | | Customer Reviews | 4.8 out of 5 stars 487 Reviews | | Item Weight | 0.28 Pounds | | Manufacturer | NGK | | Manufacturer Part Number | CR9EIX | | Model | 3521 | | OEM Equivalent Part Number | 7085731 | | OEM Part Number | 7085731 | | Thread Size | 10mm | | Top Material Type | Iridium | | Vehicle Service Type | Car | | What Is In the Box | 3521 | ## Product Details - **Brand:** NGK - **Core Material:** Iridium - **Thread Size:** 10mm - **Top Material Type:** Iridium - **Vehicle Service Type:** Car ## Images ![NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/-- - Image 1](https://m.media-amazon.com/images/I/61wBxBvQUhL.jpg) ![NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/-- - Image 2](https://m.media-amazon.com/images/I/61xGt1UU9GL.jpg) ![NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/-- - Image 3](https://m.media-amazon.com/images/I/51OGK696KIL.jpg) ![NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/-- - Image 4](https://m.media-amazon.com/images/I/51uBhtXk3NL.jpg) ![NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/-- - Image 5](https://m.media-amazon.com/images/I/61CUnIeqKQL.jpg) ## Questions & Answers **Q: Are these ngk 3521 cr9eix iridium ix spark plugs?** A: These are correct and they perform flawlessly! Ron **Q: Will these fit a 2019 polaris rzr turbo s** A: To be safe: check with dealer or a cross reference app to be sure. Ron **Q: Will this work on my Harley Davidson 2018 street glide special?** A: I have a 2017 Road King with the Milwaukee 8 and this is the one it calls for. **Q: Are these the right iridium plugs for an Indian scout 60?** A: NGK has multiple grades of plugs that may fit your engine. It is recommended to go to NGK site at https://ngksparkplugs.com/en/part-finder to verify the applications that will fit your engine. This site will show you all of the available plugs to fit your engine and will also show you which grade plug is recommended for the best performance of your specific engine. ## Customer Reviews ### ⭐⭐⭐⭐⭐ GOOD PRODUCT *by M***. on 20 February 2026* ### ⭐⭐⭐⭐⭐ Value *by S***T on 23 August 2024* ### ⭐⭐⭐⭐⭐ Decent price *by R***R on 30 November 2025* ## Frequently Bought Together - NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/-- - K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils, Wrench Off Nut: Fits Select Suzuki Motorcycles, KN-138 - K&N Engine Air Filter: High Performance, Premium, Powersport Air Filter: Fits 2006-2010 SUZUKI (GSXR600, GSXR750) SU-7506 --- ## 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.be/products/471862111-ngk-cr9eix-iridium-ix-spark-plug-4-pack](https://www.desertcart.be/products/471862111-ngk-cr9eix-iridium-ix-spark-plug-4-pack) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-04-23*