--- product_id: 135322366 title: "NGK Spark Plug LTR6IX-11 6509 Pack of 8 | Replaces SP526 CYFS12YP 4714 4719 5339 ITV20 IT20TT ITV20TT IVT20TT 6728 9617 HR7MPP30X 3017 XP5263 XP5363 XP5863." brand: "ngk" price: "€ 140.69" currency: EUR in_stock: true reviews_count: 8 category: "Ngk" url: https://www.desertcart.hr/products/135322366-ngk-spark-plug-ltr6ix-11-6509-pack-of-8-replaces store_origin: HR region: Croatia --- # Iridium IX for superior spark Pack of 8 for full engine refresh Direct OEM replacement fit NGK Spark Plug LTR6IX-11 6509 Pack of 8 | Replaces SP526 CYFS12YP 4714 4719 5339 ITV20 IT20TT ITV20TT IVT20TT 6728 9617 HR7MPP30X 3017 XP5263 XP5363 XP5863. **Brand:** ngk **Price:** € 140.69 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your drive with NGK’s ultimate spark power! ## Quick Answers - **What is this?** NGK Spark Plug LTR6IX-11 6509 Pack of 8 | Replaces SP526 CYFS12YP 4714 4719 5339 ITV20 IT20TT ITV20TT IVT20TT 6728 9617 HR7MPP30X 3017 XP5263 XP5363 XP5863. by ngk - **How much does it cost?** € 140.69 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/135322366-ngk-spark-plug-ltr6ix-11-6509-pack-of-8-replaces) ## 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 - • **Complete 8-Pack Value:** Replace all cylinders at once to maintain balanced engine performance and avoid mid-drive surprises. - • **Durability That Lasts:** Built to withstand high temperatures and corrosion, ensuring consistent performance mile after mile. - • **OEM-Grade Fit & Finish:** Guaranteed direct replacement with original NGK packaging and hardware for hassle-free installation. - • **Precision Iridium Spark:** Experience enhanced ignition efficiency with NGK’s premium Iridium IX electrodes for smoother starts and improved fuel economy. - • **Trusted by Professionals:** Rated 4.8/5 by over 100 users, a top choice for Ford F-150 and other vehicle owners seeking reliable ignition upgrades. ## Overview The NGK Iridium IX 6509 Spark Plug 8-pack offers a direct OEM replacement solution featuring advanced iridium electrodes for superior ignition performance and durability. Designed for cars and trucks, this set ensures consistent engine efficiency and smooth operation, backed by high customer ratings and genuine NGK quality. ## Description Genuine 8 pack NGK Iridium IX 6509 Spark Plug Review: Instant Performance - Great choice for 2011 Ford F-150 5.0 great performance, installation was open and replace pre-gapped and everything. Durable and smooth after 4 months so far. Review: Good spark plugs and for a good price. Also grab a gauge to properly gap! - Working well so far. Product was packaged nicely and authentically from NGK. Plugs feel sturdy, and fit in socket and were installed and torqued easily. Plugs will need to be gapped manually with a gauge. ## Features - 8 pack NGK Iridium IX 6509 Spark Plug - Genuine NGK Parts - Includes original packaging and hardware - Direct replacement auto parts - Confirm vehicle fitment with desertcart Confirmed Fit ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07PJ52HYJ | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #25,598 in Automotive ( See Top 100 in Automotive ) #171 in Automotive Replacement Spark Plugs | | Brand | NGK | | Brand Name | NGK | | Compatible with Vehicle Type | Car, Truck | | Core Material | Copper | | Customer Reviews | 4.8 out of 5 stars 107 Reviews | | Included Components | 6509 | | Item Weight | 0.88 Pounds | | Manufacturer | NGK | | Manufacturer Part Number | 6509 | | Manufacturer Warranty Description | Includes manufacturer provided warranty | | Model Number | 6509 | | Number of Items | 1 | | OEM Equivalent Part Number | 6509 | | Thread Size | 14mm | | Top Material Type | Nickel | | UPC | 087295180334 | | Unit Count | 1.0 Count | | Vehicle Service Type | Car, Truck | ## Product Details - **Brand:** NGK - **Core Material:** Copper - **Thread Size:** 14mm - **Top Material Type:** Nickel - **Vehicle Service Type:** Car, Truck ## Images ![NGK Spark Plug LTR6IX-11 6509 Pack of 8 | Replaces SP526 CYFS12YP 4714 4719 5339 ITV20 IT20TT ITV20TT IVT20TT 6728 9617 HR7MPP30X 3017 XP5263 XP5363 XP5863. - Image 1](https://m.media-amazon.com/images/I/6127F3keTTL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Instant Performance *by C***R on April 11, 2026* Great choice for 2011 Ford F-150 5.0 great performance, installation was open and replace pre-gapped and everything. Durable and smooth after 4 months so far. ### ⭐⭐⭐⭐⭐ Good spark plugs and for a good price. Also grab a gauge to properly gap! *by R***I on September 10, 2025* Working well so far. Product was packaged nicely and authentically from NGK. Plugs feel sturdy, and fit in socket and were installed and torqued easily. Plugs will need to be gapped manually with a gauge. ### ⭐⭐⭐⭐⭐ Best plugs I’ve ever used! *by R***M on December 14, 2025* These plugs are the best! I should’ve replaced them sooner. Went from 12mpg to 18mpg! ## Frequently Bought Together - NGK Spark Plug LTR6IX-11 6509 Pack of 8 - Permatex 22058 Dielectric Tune-Up Grease, 3oz. - High Performance Dielectric Grease Used To Protect Terminals, Spark Plugs, Wiring And Other Electrical Connections Against Salt, Dirt, And Corrosion - CTA Tools 3235 Spark Plug Gapper --- ## 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/135322366-ngk-spark-plug-ltr6ix-11-6509-pack-of-8-replaces](https://www.desertcart.hr/products/135322366-ngk-spark-plug-ltr6ix-11-6509-pack-of-8-replaces) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-08-22*