--- product_id: 30955245 title: "NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/-- | Replaces RG6HCC 31600012 31600085 90793-20123 90793-20125 90793-20151 90793-2B125 99000-69835-CR9 999-06910-X9-024 4132." brand: "ngk" price: "$72.12" currency: USD in_stock: true category: "Ngk" url: https://www.desertcart.us/products/30955245-ngk-cr9eix-iridium-ix-spark-plug-4-pack-replaces-rg6hcc store_origin: US region: United States of America --- # Iridium core for max spark efficiency High durability for long-lasting performance OEM exact fit for seamless installation NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/-- | Replaces RG6HCC 31600012 31600085 90793-20123 90793-20125 90793-20151 90793-2B125 99000-69835-CR9 999-06910-X9-024 4132. **Brand:** ngk **Price:** $72.12 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your drive with NGK Iridium IX – where precision meets power! ## Quick Answers - **What is this?** NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/-- | Replaces RG6HCC 31600012 31600085 90793-20123 90793-20125 90793-20151 90793-2B125 99000-69835-CR9 999-06910-X9-024 4132. by ngk - **How much does it cost?** $72.12 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/30955245-ngk-cr9eix-iridium-ix-spark-plug-4-pack-replaces-rg6hcc) ## 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 - • **Enduring Performance:** Crafted with premium materials to withstand extreme conditions and extend engine life. - • **Warranty-Backed Quality:** Includes manufacturer warranty for peace of mind and assured durability. - • **Trusted by Professionals:** Rated 4.8/5 by 588 users, a top choice for reliable automotive maintenance. - • **Precision Engine Ignition:** Iridium tip delivers superior spark for optimized combustion and fuel efficiency. - • **Seamless OEM Compatibility:** Guaranteed perfect fit with vehicle-specific design, eliminating guesswork and downtime. ## Overview The NGK CR9EIX Iridium IX Spark Plug is a genuine OEM replacement part designed for cars and trucks, featuring a durable iridium core for enhanced ignition performance. With a 10mm thread size and vehicle-specific fit, it ensures seamless installation and reliable operation. Highly rated by users and backed by a manufacturer warranty, this spark plug delivers long-lasting efficiency and superior engine responsiveness. ## Description NGK OEM part# 3521 ## Features - Genuine, OEM Ngk Replacement Part - Ngk replacement spark plug, part number 3521 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004SKYAWM | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #7,269 in Automotive ( See Top 100 in Automotive ) #27 in Automotive Replacement Spark Plugs | | Brand Name | NGK | | Compatible with Vehicle Type | Car, Truck | | Core Material | Iridium | | Customer Reviews | 4.8 4.8 out of 5 stars (588) | | Included Components | 3521 | | Item Weight | 4.48 ounces | | Manufacturer | NGK | | Manufacturer Part Number | CR9EIX | | Manufacturer Warranty Description | Includes manufacturer provided warranty | | Model Number | 3521 | | Number of Items | 1 | | OEM Equivalent Part Number | 7085731 | | Thread Size | 10mm | | Top Material Type | Iridium | | Unit Count | 1 Count | ## Product Details - **Brand:** NGK - **Core Material:** Iridium - **Thread Size:** 10mm - **Top Material Type:** Iridium - **Vehicle Service Type:** Car, Truck ## Images ![NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/-- | Replaces RG6HCC 31600012 31600085 90793-20123 90793-20125 90793-20151 90793-2B125 99000-69835-CR9 999-06910-X9-024 4132. - Image 1](https://m.media-amazon.com/images/I/61wBxBvQUhL.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. ## 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.us/products/30955245-ngk-cr9eix-iridium-ix-spark-plug-4-pack-replaces-rg6hcc](https://www.desertcart.us/products/30955245-ngk-cr9eix-iridium-ix-spark-plug-4-pack-replaces-rg6hcc) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-24*