--- product_id: 6242030 title: "E3 Spark Plugs E3.68 Premium Automotive Spark Plug with DiamondFIRE Technology for Hemi Engines, 14mm, 1.000\" Reach, Gasket Seat, Pack of 1" brand: "e3" price: "£12.91" currency: GBP in_stock: true category: "E3" url: https://www.desertcart.co.uk/products/6242030-e3-spark-plugs-e3-68-premium-automotive-spark-plug-diamondfire store_origin: GB region: United Kingdom --- # 12% more power boost 13% improved fuel efficiency Lower emissions & cleaner burn E3 Spark Plugs E3.68 Premium Automotive Spark Plug with DiamondFIRE Technology for Hemi Engines, 14mm, 1.000" Reach, Gasket Seat, Pack of 1 **Brand:** e3 **Price:** £12.91 **Availability:** ✅ In Stock ## Summary > ⚡ Spark your engine’s potential with DiamondFIRE brilliance! ## Quick Answers - **What is this?** E3 Spark Plugs E3.68 Premium Automotive Spark Plug with DiamondFIRE Technology for Hemi Engines, 14mm, 1.000" Reach, Gasket Seat, Pack of 1 by e3 - **How much does it cost?** £12.91 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/6242030-e3-spark-plugs-e3-68-premium-automotive-spark-plug-diamondfire) ## Best For - e3 enthusiasts ## Why This Product - Trusted e3 brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Power Up Your Drive:** Delivers up to 12% more engine power for that extra edge - • **Fuel Smarter, Drive Longer:** Boosts fuel economy by up to 13%, saving you money and trips to the pump - • **Built to Last, Backed to Perform:** Yttrium-enhanced alloy with 5-year/100,000-mile warranty for long-term reliability - • **Cleaner Combustion, Cleaner Planet:** Reduces harmful emissions and carbon buildup for eco-conscious performance - • **DiamondFIRE Tech Ignites Efficiency:** Patented side-wire design for faster, fuller combustion ## Overview The E3.68 Premium Spark Plug with patented DiamondFIRE technology is engineered for Hemi and domestic engines, offering a 14mm thread and 1.000" reach. It enhances engine power by up to 12%, improves fuel efficiency by up to 13%, and reduces emissions through a more complete fuel burn. Constructed with durable Yttrium-enhanced alloy, it ensures long-lasting performance backed by a 5-year/100,000-mile warranty, making it a smart upgrade for professional drivers seeking optimized engine efficiency and eco-friendly operation. ## Description Product Description The E3.68 automotive spark plug is a high-performance solution designed to fit a wide range of late-model applications, particularly Hemi engines. With a 14mm thread diameter and 1.000-inch reach, this spark plug features a gasket seat and is widely available in automotive retail stores. E3’s patented DiamondFIRE side wire is securely fastened to the shell using a three-leg design, which allows for excellent heat transfer and creates more turbulence in the combustion chamber. This innovative design results in a more complete fuel burn, leading to increased power, better fuel efficiency, and reduced hydrocarbon emissions during long-term use. Includes a unique ground electrode and full-size center electrode, offering optimal performance for up to five years or 100,000 miles. The DiamondFIRE open design creates the preferred edge-to-edge spark path, replenishing the spark zone with fresh fuel/air charge and directly exposing the flame front to the piston head, resulting in improved engine power, reduced fuel consumption, and decreased carbon monoxide emissions. This spark plug design has been proven to extend the life of the spark plug while offering faster, smoother acceleration for a more efficient engine operation. desertcart.com ## Features - FOR DOMESTIC APPLICATIONS: Designed to fit a wide range of domestic vehicles, this spark plug enhances power, improves fuel economy, and reduces harmful hydrocarbon emissions, making it ideal for various engine types and models - DIAMONDFIRE TECHNOLOGY: Patented side-wire electrode design ensures faster, more complete combustion, optimizing engine efficiency, improving power output, and reducing harmful emissions - MORE POWER AND FUEL EFFICIENCY: E3 Spark Plugs deliver up to 12% more power and up to 13% better fuel economy in small engines, and up mid-single digits on automotive applications, helping to enhance overall engine performance and reduce fuel consumption across a wide range of vehicles - LOWER EMISSIONS: The more complete burn helps to reduce emissions, minimize carbon buildup, promote cleaner combustion, and support compliance with modern environmental and emissions standards - LONG-LASTING PERFORMANCE: Built with Yttrium-enhanced alloy for durability and pre-ignition prevention; backed by a 5-year/100,000-mile limited warranty for reliable, extended use without frequent replacements ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0018JU1N8 | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #265,558 in Automotive ( See Top 100 in Automotive ) #1,533 in Automotive Replacement Spark Plugs | | Brand Name | E3 | | Compatible with Vehicle Type | Car | | Core Material | Copper | | Customer Reviews | 4.4 4.4 out of 5 stars (449) | | Gap Size | 0.04 inches | | Global Trade Identification Number | 00894489000688 | | Included Components | (1) Spark Plug | | Item Type Name | Spark Plugs | | Item Weight | 1.6 ounces | | Manufacturer | E3 Spark Plugs | | Manufacturer Part Number | E3.68 | | Manufacturer Warranty Description | 5 Year/100,000 Mile | | Model Number | E3.68 | | Number of Items | 1 | | Number of Packs | 1 | | OEM Equivalent Part Number | E3.68 | | Thread Size | 14mm | | Top Material Type | Alloy Steel | | UPC | 894489000688 | | Unit Count | 1 Count | ## Product Details - **Brand:** E3 - **Core Material:** Copper - **Thread Size:** 14mm - **Top Material Type:** Alloy Steel - **Vehicle Service Type:** Car ## Images ![E3 Spark Plugs E3.68 Premium Automotive Spark Plug with DiamondFIRE Technology for Hemi Engines, 14mm, 1.000" Reach, Gasket Seat, Pack of 1 - Image 1](https://m.media-amazon.com/images/I/41BMsSJAyHL.jpg) ![E3 Spark Plugs E3.68 Premium Automotive Spark Plug with DiamondFIRE Technology for Hemi Engines, 14mm, 1.000" Reach, Gasket Seat, Pack of 1 - Image 2](https://m.media-amazon.com/images/I/71AHlIouv+L.jpg) ![E3 Spark Plugs E3.68 Premium Automotive Spark Plug with DiamondFIRE Technology for Hemi Engines, 14mm, 1.000" Reach, Gasket Seat, Pack of 1 - Image 3](https://m.media-amazon.com/images/I/81nBJg9Gs4L.jpg) ![E3 Spark Plugs E3.68 Premium Automotive Spark Plug with DiamondFIRE Technology for Hemi Engines, 14mm, 1.000" Reach, Gasket Seat, Pack of 1 - Image 4](https://m.media-amazon.com/images/I/718sh6wkGPL.jpg) ![E3 Spark Plugs E3.68 Premium Automotive Spark Plug with DiamondFIRE Technology for Hemi Engines, 14mm, 1.000" Reach, Gasket Seat, Pack of 1 - Image 5](https://m.media-amazon.com/images/I/813F6j40M4L.jpg) ## Questions & Answers **Q: what diameter is the thread and length of thread for e368 spark plug. must be in metric readings** A: Sorry,i js bought this for my friend. **Q: can these work on 2015 corolla** A: if you are unsure of fitment OR don't trust the fitment guides on amazon, you can look up exact fitment on E3 website... e3sparkplugs.com ... they have fitment for nearly all applications... **Q: Is it strongly recommended that I install new ignition coils along with the new e3 spark plugs? Or would keeping my stock ignition coils work fine ?** A: All the customers that I sold E3 spark plugs never change the coils. It should be ok. Just make sure you check for the fitment on the plugs vs you vehicle. e3sparkplugs.com **Q: can i use these to replace 2006 is250 spark plugs? if so, do they just screw in like any other sparkplug?** A: according to the e3 website, that is the correct plug for your car. They screw in just line normal plugs. YOu don't have to gap them. http://shop.e3sparkplugs.com/automotive-spark-plugs/e3.68-spark-plug/?sd=TWpBd05ueE1aWGgxYzN4SlV6STFNQ0I4TWk0MVRDQWdWallnSUVaSklDQW9NalJXS1NBZ1JFOUlReUFnTkVkU1JsTkZJQ0FnfEl6bzllRXN5VVRoUlhqWjZmVnBEY2c9PQ== ## Frequently Bought Together - E3 Spark Plugs E3.68 Premium Automotive Spark Plug with DiamondFIRE Technology for Hemi Engines, 14mm, 1.000" Reach, Gasket Seat, Pack of 1 - LEXIVON 5/8" Swivel Magnetic Spark Plug Socket, 3/8" Drive x 10" Total Length | Enhanced Magnetic Design with Thin Wall Socket, Cr-v Steel (LX-122) - YHTAUTO Ignition Coil Replacement for Dodge Challenger Charger Durango Magnum Ram 1500 2500 3500, Jeep Grand Cherokee Wrangler, Chrysler 300 Aspen, V8 5.7 6.1 6.2 6.4, Replace 6735202 --- ## 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.uk/products/6242030-e3-spark-plugs-e3-68-premium-automotive-spark-plug-diamondfire](https://www.desertcart.co.uk/products/6242030-e3-spark-plugs-e3-68-premium-automotive-spark-plug-diamondfire) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-08-19*