--- product_id: 30955245 title: "NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/--" brand: "ngk" price: "฿4030" currency: THB in_stock: true reviews_count: 13 category: "Ngk" url: https://www.desertcart.co.th/products/30955245-ngk-cr9eix-iridium-ix-spark-plug-4-pack store_origin: TH region: Thailand --- # Iridium core for superior ignition OEM perfect fit, hassle-free install Faster startup response NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/-- **Brand:** ngk **Price:** ฿4030 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your ride with NGK Iridium IX – where precision meets performance! ## Quick Answers - **What is this?** NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/-- by ngk - **How much does it cost?** ฿4030 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/30955245-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:** Built to endure, these plugs reduce replacement frequency, saving you time and money. - • **Rapid Engine Startups:** Cut down your wait time with quicker firing plugs that get your engine roaring in seconds. - • **OEM-Grade Compatibility:** Seamlessly replace your original spark plugs with guaranteed perfect fit and performance. - • **Trusted by Professionals:** Join thousands of satisfied users who rate this plug 4.8/5 for consistent, dependable power delivery. - • **Precision Iridium Ignition:** Experience unmatched spark efficiency with NGK's premium iridium core, engineered for longevity and reliability. ## Overview The NGK CR9EIX Iridium IX Spark Plug is a genuine OEM replacement part designed for cars and trucks, featuring a durable iridium core that ensures faster startups and longer service intervals. Highly rated by users for its perfect fit and reliable ignition, it’s the smart choice for professionals seeking consistent engine performance without chasing horsepower myths. ## Description NGK OEM part# 3521 Review: 2024 Yamaha VX Limited Tr1 Engine - We use these plugs in our 2024 Yamaha VX limited waverunner with the TR-1 engine. They do NOT improve horsepower or top speed, so if your purchasing for one of those, that is a fools errand. What these plugs DO in fact benefit you is longevity and quicker firing at startups. Some folks are saying they notice quicker throttle response and all and that's just psychological foolery lol. These are an excellent replacement for the oem NKG CR9EB plugs if your looking for less changing intervals and improved startups. Review: GOOD PRODUCT - VALUE WAS GREAT FOR QUALITY. FIT WAS PERFECT START WAS RIGHT ON. POWER WAS IMPROVED. DURABLE AS IT SHOULD BE ## 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 | #8,964 in Automotive ( See Top 100 in Automotive ) #36 in Automotive Replacement Spark Plugs | | Brand | NGK | | Brand Name | NGK | | Compatible with Vehicle Type | Car, Truck | | Core Material | Iridium | | Customer Reviews | 4.8 out of 5 stars 568 Reviews | | 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 | 1.0 Count | | Vehicle Service Type | Car, Truck | ## 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/-- - 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 ### ⭐⭐⭐⭐⭐ 2024 Yamaha VX Limited Tr1 Engine *by T***N on May 19, 2026* We use these plugs in our 2024 Yamaha VX limited waverunner with the TR-1 engine. They do NOT improve horsepower or top speed, so if your purchasing for one of those, that is a fools errand. What these plugs DO in fact benefit you is longevity and quicker firing at startups. Some folks are saying they notice quicker throttle response and all and that's just psychological foolery lol. These are an excellent replacement for the oem NKG CR9EB plugs if your looking for less changing intervals and improved startups. ### ⭐⭐⭐⭐⭐ GOOD PRODUCT *by M***. on February 20, 2026* VALUE WAS GREAT FOR QUALITY. FIT WAS PERFECT START WAS RIGHT ON. POWER WAS IMPROVED. DURABLE AS IT SHOULD BE ### ⭐⭐⭐⭐⭐ Great plugs *by E***G on June 26, 2026* Second time using these in my 2018 RGS. Spark gap was correct out of the box--the bike seems to like them. ## 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.co.th/products/30955245-ngk-cr9eix-iridium-ix-spark-plug-4-pack](https://www.desertcart.co.th/products/30955245-ngk-cr9eix-iridium-ix-spark-plug-4-pack) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-07-07*