--- product_id: 61038177 title: "(6509) LTR6IX-11 Iridium IX Spark Plug, Pack of 1" brand: "ngk" price: "€ 47.97" currency: EUR in_stock: true reviews_count: 5 category: "Ngk" url: https://www.desertcart.hr/products/61038177-6509-ltr6ix-11-iridium-ix-spark-plug-pack-of-1 store_origin: HR region: Croatia --- # 80,000-100,000 km durability 0.6mm ultra-fine iridium tip Superior anti-corrosion & anti-seizing (6509) LTR6IX-11 Iridium IX Spark Plug, Pack of 1 **Brand:** ngk **Price:** € 47.97 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your ride with NGK’s precision spark – where durability meets performance! ## Quick Answers - **What is this?** (6509) LTR6IX-11 Iridium IX Spark Plug, Pack of 1 by ngk - **How much does it cost?** € 47.97 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/61038177-6509-ltr6ix-11-iridium-ix-spark-plug-pack-of-1) ## 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 - • **Trusted NGK Quality:** Backed by a 4.7-star rating and engineered for high-tech, high-performance engines. - • **Precision Iridium Tip:** Ultra-fine 0.6mm electrode for maximum spark efficiency and engine responsiveness. - • **Long-Lasting Performance:** Rated for up to 100,000 km, ensuring fewer replacements and more road time. - • **Corrosion-Resistant Build:** Advanced anti-corrosion and anti-seizing properties protect your engine under all conditions. - • **Universal Fit for Motorcycles:** Designed to fit a wide range of motorcycle engines, making upgrades effortless. ## Overview The NGK LTR6IX-11 Iridium IX Spark Plug features an ultra-fine 0.6mm iridium tip for superior ignition efficiency, rated for 80,000 to 100,000 km of reliable use. Its advanced anti-corrosion and anti-seizing properties ensure long-lasting durability, making it an ideal upgrade for high-performance motorcycle engines. Trusted globally and highly rated, this spark plug delivers consistent power and smoother engine operation. ## Description NGK iridium plugs represent the ultimate evolution of spark plug technology and performance. The iridium center electrode is both stronger and harder than platinum. This allows NGK engineers to design an ultra-fine (0.6mm)center electrode reducing the vol Review: Perfect fit for 2014 Ford focus - These spark plugs are rated form 80000 to 100000 km. The identical ,double the price, Laser Iridium LTR6B19 plugs have an additional platinum lower electrode to extend the max mileage to 160000 km. . Review: Great Replacement in 2009 Acadia - Have about 5,000 miles on them, so far completely uneventful. I replaced the stock platinum plugs with these after the engine started stuttering badly on steeper inclines around our house. Its apparent immediately that the car is much happier using these than what was in it to begin with. Didn't seem to increase gas mileage (I'd hoped they would) but running better is sure to be better for the life of the engine. ## Features - Made from durable material - Fine iridium tip ensures high durability - Features superior anti-corrosion and anti-seizing properties - Iridium alloy has extremely high melting point, perfect for today's high tech, high performance engines - International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B001RLXDYQ | | Automotive Fit Type | Universal Fit | | Brand | NGK | | Brand Name | NGK | | Compatible with Vehicle Type | Motorcycle | | Core Material | Iridium | | Core material | Iridium | | Customer Reviews | 4.7 out of 5 stars 118 Reviews | | Global Trade Identification Number | 00087295065099, 00087295165096 | | Item Weight | 0.05 Kilograms | | Manufacturer | NGK Spark Plugs | | Manufacturer Part Number | LTR6IX-11 | | Model Number | 6509 | | OEM Equivalent Part Number | LTR6IX-11 | | Thread Size | 14mm x 1.25mm | | Thread size | 14mm x 1.25mm | | Top Material Type | Metal | | Top material type | Metal | | UPC | 087295165096 087295065099 | | Unit Count | 1.0 count | | Vehicle service type | Motorcycle | ## Product Details - **Brand:** NGK - **Core material:** Iridium - **Thread size:** 14mm x 1.25mm - **Top material type:** Metal - **Vehicle service type:** Motorcycle ## Images ![(6509) LTR6IX-11 Iridium IX Spark Plug, Pack of 1 - Image 1](https://m.media-amazon.com/images/I/61DjMfbmYQL.jpg) ## Questions & Answers **Q: Has anyone had these for a while and did you have any problems since installing them? I have a GM 3.6 with COP and want to replace stock plugs.** A: I've had these for 2 years and I havnt had any problems after installing. Noticed a difference in performance and fuel economy **Q: how do they work on a mustang 2012 v6 ?** A: Thank you for inquiry. Yes, this will work on 2012 Ford Mustang V6. Don't hesitate to contact us if we may further assist you. **Q: What size socket wrench does this fit? When measured, it fell between 9/16" and 10/16"** A: There is no such thing as a 10/16" socket. I0/16" is 5/8". I use a 5/8" spark plug socket which has a rubber insert so the plug stays in the socket when taking out and installing. Saves a lot of trouble. Socket wrench is what you install the socket or extensions on which you will need. **Q: Suggested torque for these in an aluminum cylinder head?** A: According to NGK, it depends on the plug's diameter: 18 mm 35 to 40N·m (3.5 to 4.0 kgm) 14 mm 25 to 30N·m (2.5 to 3.0 kgm) 12 mm 15 to 20N·m (1.5 to 2.0 kgm) 10 mm 10 to 12N·m (1.0 to 1.2 kgm) 8 mm 8 to 10N·m (0.8 to 1.0 kgm) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect fit for 2014 Ford focus *by W***N on 25 February 2020* These spark plugs are rated form 80000 to 100000 km. The identical ,double the price, Laser Iridium LTR6B19 plugs have an additional platinum lower electrode to extend the max mileage to 160000 km. . ### ⭐⭐⭐⭐⭐ Great Replacement in 2009 Acadia *by A***Y on 14 August 2015* Have about 5,000 miles on them, so far completely uneventful. I replaced the stock platinum plugs with these after the engine started stuttering badly on steeper inclines around our house. Its apparent immediately that the car is much happier using these than what was in it to begin with. Didn't seem to increase gas mileage (I'd hoped they would) but running better is sure to be better for the life of the engine. ### ⭐⭐⭐⭐⭐ NGK Spark Plugs Rock!!! *by S***S on 20 June 2015* I put these in my 2012 Chevy Camaro V6. Install was a breeze and I could definitely tell the difference in engine idle, throttle response and power when driving. I would recommend to anyone who's looking to upgrade. --- ## 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.hr/products/61038177-6509-ltr6ix-11-iridium-ix-spark-plug-pack-of-1](https://www.desertcart.hr/products/61038177-6509-ltr6ix-11-iridium-ix-spark-plug-pack-of-1) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-09-09*