--- 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: "261 DH" currency: MAD in_stock: true url: https://www.desertcart.ma/products/81919183-ngk-spark-plug-ngk-iridium-ix-14-mm-thread-0 store_origin: MA region: Morocco --- # Iridium tip for max durability 14mm x 1.25mm precision thread Superior anti-corrosion & anti-seize NGK Spark Plug, NGK Iridium IX, 14 mm Thread, 0.984 in Reach, Tapered Seat, Stock Number 6509, Resistor, Each **Brand:** ngk **Price:** 261 DH **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your ride with NGK’s iridium edge! ## 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?** 261 DH with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ma](https://www.desertcart.ma/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 - • **Precision Fit:** 14mm x 1.25mm thread size ensures seamless installation and optimal performance for your motorcycle. - • **Unmatched Longevity:** Fine iridium tip engineered to outlast standard plugs, keeping your engine firing flawlessly. - • **High-Performance Ready:** Iridium alloy’s ultra-high melting point is built for today’s demanding, high-tech engines. - • **Corrosion-Resistant Armor:** Advanced anti-corrosion and anti-seizing properties protect your spark plug from wear and tear. - • **Trusted Brand Reliability:** NGK’s proven quality means you’re investing in a spark plug that professionals rely on. ## Overview The NGK LTR6IX-11 Iridium IX Spark Plug features a fine iridium tip for exceptional durability, a precise 14mm x 1.25mm thread for perfect fitment, and superior anti-corrosion and anti-seizing properties. Designed for high-performance motorcycle engines, it delivers reliable ignition and long-lasting performance trusted by professionals. ## 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 | |---------------|-------| | Brand | NGK | | Core Material | Iridium | | Thread Size | 14mm x 1.25mm | | Top Material Type | Metal | | Vehicle Service Type | Motorcycle | | Global Trade Identification Number | 00087295165096, 00087295065099 | | UPC | 087295165096 087295065099 | | OEM Part Number | LTR6IX-11 | | Manufacturer | Auto Extra | | Model | NGK6509 | | Item Weight | 1.58 ounces | | Product Dimensions | 37.4 x 9.84 x 8.27 inches | | Item model number | LTR6IX-11 | | Is Discontinued By Manufacturer | No | | Manufacturer Part Number | LTR6IX-11 | ## 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.ma/products/81919183-ngk-spark-plug-ngk-iridium-ix-14-mm-thread-0](https://www.desertcart.ma/products/81919183-ngk-spark-plug-ngk-iridium-ix-14-mm-thread-0) --- *Product available on Desertcart Morocco* *Store origin: MA* *Last updated: 2026-04-26*