--- product_id: 81919183 title: "NGK Spark Plug, NGK Iridium IX, 14 mm Thread, 0.984 in Reach, Tapered Seat, Stock Number 6509, Resistor, Each" brand: "ngk" price: "€ 12.85" currency: EUR in_stock: true category: "Ngk" url: https://www.desertcart.ie/products/81919183-ngk-spark-plug-ngk-iridium-ix-14-mm-thread-0 store_origin: IE region: Ireland --- # Iridium tip for max durability 14 mm precision thread Superior anti-corrosion & anti-seizing NGK Spark Plug, NGK Iridium IX, 14 mm Thread, 0.984 in Reach, Tapered Seat, Stock Number 6509, Resistor, Each **Brand:** ngk **Price:** € 12.85 **Availability:** ✅ In Stock ## Summary > 🔥 Ignite your ride with NGK Iridium IX – where precision meets power! ## Quick Answers - **What is this?** NGK Spark Plug, NGK Iridium IX, 14 mm Thread, 0.984 in Reach, Tapered Seat, Stock Number 6509, Resistor, Each by ngk - **How much does it cost?** € 12.85 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/81919183-ngk-spark-plug-ngk-iridium-ix-14-mm-thread-0) ## 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 - • **Built to Last:** Constructed from premium materials with a high melting point iridium alloy designed for today’s demanding engines. - • **Iridium IX Technology:** Fine iridium tip delivers exceptional durability and consistent spark for reliable ignition every time. - • **Trusted by Professionals:** NGK’s industry-leading quality and reliability make this spark plug a must-have for serious riders who demand the best. - • **Corrosion & Seize Resistant:** Advanced anti-corrosion and anti-seizing properties keep your spark plug performing flawlessly under extreme conditions. - • **Precision Fit for Peak Performance:** 14 mm thread and 0.984 in reach ensure perfect compatibility with your high-performance motorcycle engine. ## Overview The NGK Iridium IX spark plug features a 14 mm thread and 0.984 inch reach with a tapered seat, engineered for motorcycle engines. Its fine iridium tip offers superior durability and a high melting point, ensuring reliable ignition and long-lasting performance. Enhanced with anti-corrosion and anti-seizing properties, this spark plug is designed to withstand harsh conditions, making it a top choice for high-performance and professional riders. ## Description Spark Plug, NGK Iridium IX, 14 mm Thread, 0.984 in Reach, Tapered Seat, Stock Number 6509, Resistor, Each ## Features - You can depend on NGK for quality and reliability - Constructed 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B001RLXDYQ | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #396,030 in Automotive ( See Top 100 in Automotive ) #59 in Automotive Performance Spark Plugs #2,182 in Automotive Replacement Spark Plugs | | Brand | NGK | | Brand Name | NGK | | Compatible with Vehicle Type | Motorcycle | | Core Material | Iridium | | Customer Reviews | 4.6 out of 5 stars 125 Reviews | | Global Trade Identification Number | 00087295065099, 00087295165096 | | Included Components | Per Item Description | | Item Weight | 0.05 Kilograms | | Manufacturer | Auto Extra | | Manufacturer Part Number | LTR6IX-11 | | Manufacturer Warranty Description | 30 Days | | Model Number | 6509 | | OEM Equivalent Part Number | LTR6IX-11 | | Thread Size | 14mm x 1.25mm | | 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 ![NGK Spark Plug, NGK Iridium IX, 14 mm Thread, 0.984 in Reach, Tapered Seat, Stock Number 6509, Resistor, Each - 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) --- ## 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.ie/products/81919183-ngk-spark-plug-ngk-iridium-ix-14-mm-thread-0](https://www.desertcart.ie/products/81919183-ngk-spark-plug-ngk-iridium-ix-14-mm-thread-0) --- *Product available on Desertcart Ireland* *Store origin: IE* *Last updated: 2026-07-17*