--- product_id: 61038177 title: "NGK (6509) LTR6IX-11 Iridium IX Spark Plug, Pack of 1" brand: "ngk" price: "฿2596" currency: THB in_stock: true url: https://www.desertcart.co.th/products/61038177-ngk-6509-ltr6ix-11-iridium-ix-spark-plug-pack-1 store_origin: TH region: Thailand --- # Iridium tip for max durability High melting point alloy for high-tech engines Superior anti-corrosion & anti-seizing NGK (6509) LTR6IX-11 Iridium IX Spark Plug, Pack of 1 **Brand:** ngk **Price:** ฿2596 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your ride with NGK’s iridium edge – where durability meets high performance! ## Quick Answers - **What is this?** NGK (6509) LTR6IX-11 Iridium IX Spark Plug, Pack of 1 by ngk - **How much does it cost?** ฿2596 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/61038177-ngk-6509-ltr6ix-11-iridium-ix-spark-plug-pack-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 - • **Unmatched Longevity:** Fine iridium tip engineered to outlast standard plugs, keeping your engine firing flawlessly. - • **Precision Performance:** Iridium alloy withstands extreme heat, perfect for modern high-performance engines demanding reliability. - • **Lightweight Efficiency:** At just 45g, it delivers power without adding bulk, optimizing engine responsiveness. - • **Global Quality Assurance:** Internationally sourced with strict quality standards, designed to meet diverse engine specifications worldwide. - • **Corrosion-Resistant Armor:** Built with superior anti-corrosion and anti-seizing properties to ensure hassle-free maintenance. ## Overview The NGK LTR6IX-11 Iridium IX Spark Plug features a fine iridium tip for exceptional durability, superior anti-corrosion and anti-seizing properties, and an iridium alloy with a high melting point designed for modern high-performance engines. Lightweight and precision-engineered, it ensures reliable ignition and long-lasting performance across global engine standards. ## Description NGK(6509) LTR6IX-11 Iridium IX Spark Plug, Pack of 1 ## 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 | |---------------|-------| | Manufacturer | NGK Spark Plugs | | Brand | NGK | | Product Dimensions | 95 x 25 x 21 cm; 45 g | | Item model number | LTR6IX-11 | | Manufacturer part number | LTR6IX-11 | | OEM Part Number | LTR6IX-11 | | Position | Unknown | | Item Weight | 45 g | ## Product Details - **Brand:** NGK - **Core material:** Iridium - **Thread size:** 14mm x 1.25mm - **Top material type:** Metal - **Vehicle service type:** Motorcycle ## Images ![NGK (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) --- ## 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/61038177-ngk-6509-ltr6ix-11-iridium-ix-spark-plug-pack-1](https://www.desertcart.co.th/products/61038177-ngk-6509-ltr6ix-11-iridium-ix-spark-plug-pack-1) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-25*