--- product_id: 80034395 title: "Autolite 103 Copper Resistor Automotive Replacement Spark Plugs (4 Pack)" brand: "autolite iridium ultra" price: "฿1412" currency: THB in_stock: true reviews_count: 11 url: https://www.desertcart.co.th/products/80034395-autolite-103-copper-resistor-automotive-replacement-spark-plugs-4-pack store_origin: TH region: Thailand --- # Boosts fuel efficiency & smooth acceleration Full copper core for max thermal conductivity Leak-proof copper-glass seal for durability Autolite 103 Copper Resistor Automotive Replacement Spark Plugs (4 Pack) **Brand:** autolite iridium ultra **Price:** ฿1412 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your drive with Autolite’s copper core spark plugs — performance that sparks envy! ## Quick Answers - **What is this?** Autolite 103 Copper Resistor Automotive Replacement Spark Plugs (4 Pack) by autolite iridium ultra - **How much does it cost?** ฿1412 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/80034395-autolite-103-copper-resistor-automotive-replacement-spark-plugs-4-pack) ## Best For - autolite iridium ultra enthusiasts ## Why This Product - Trusted autolite iridium ultra brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Heat-fused internal seal and leak-proof design guarantee long-lasting durability under all conditions. - • **Trusted Legacy:** Backed by Autolite’s 80+ years of innovation, delivering reliable spark plug technology you can count on. - • **Precision Engineering:** Cold-formed steel shell with precision rolled threads for a perfect, secure fit every time. - • **Fuel-Smart Performance:** Optimized for quick starts, improved fuel economy, and seamless acceleration—drive smarter, not harder. - • **Unmatched Thermal Power:** Full copper core electrode ensures superior heat transfer for peak engine performance. ## Overview Autolite 103 Copper Resistor Spark Plugs feature a full copper core electrode for enhanced thermal conductivity, a leak-proof copper-glass seal for durability, and a resistor to reduce radio frequency interference. Designed for quick starts, improved fuel efficiency, and smooth acceleration, these plugs combine precision engineering with over 80 years of trusted Autolite innovation. ## Description Autolite Copper Core Spark Plugs deliver quick starts, good fuel economy, and smooth acceleration. The copper-glass seal bonds insulator and terminal post center electrode together to ensure full required voltage at spark gap, creating a gas-tight seal that is 100 percent leak-proof. Copper Core spark plugs feature a cold-formed steel shell and precision rolled threads, and a one-piece terminal post that adds strength. The multi-rib insulator reduces the danger of "flash-over" to prevent misfires, and the resistor reduces radio frequency interference (RFI) and electrode erosion. The full copper core electrode provides better performance in all conditions. Autolite Copper Core plugs are your industry standard. ## Features - MAXIMUM PERFORMANCE: Every Copper Spark Plug has a full copper core electrode which provides higher thermal conductivity for better performance in all conditions - IMPROVED DURABILITY: All Autolite spark plugs are Leak proof and come with a heat fused internal seal for long lasting durability - CONSTRUCTION: These replacement spark plugs have a copper-glass seal which bonds the insulator and the terminal post center electrode together - FUEL EFFICIENCY: The Autolite copper automotive replacement spark plug are guaranteed to deliver quick starts, better fuel economy and smooth acceleration - AUTOLITE ADVANTAGE: Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. You can count on our copper plugs for performance and value, backed by decades of experience and passion ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | Autolite Iridium Ultra | | Core Material | Copper | | Thread Size | Regular Mouth | | Top Material Type | Alloy Steel | | Vehicle Service Type | Motorcycle | | Global Trade Identification Number | 00009100200860 | | Automotive Fit Type | Vehicle Specific Fit | | UPC | 009100200860 | | Manufacturer | Autolite | | Model | 103-4PK | | Item Weight | 1.6 ounces | | Product Dimensions | 1 x 4 x 3.5 inches | | Item model number | 103-4PK | | Is Discontinued By Manufacturer | No | | Exterior | Chrome | | Manufacturer Part Number | 103-4PK | | Position | Front, Rear | ## Product Details - **Brand:** Autolite Iridium Ultra - **Core Material:** Copper - **Thread Size:** Regular Mouth - **Top Material Type:** Alloy Steel - **Vehicle Service Type:** Motorcycle ## Images ![Autolite 103 Copper Resistor Automotive Replacement Spark Plugs (4 Pack) - Image 1](https://m.media-amazon.com/images/I/51PviK6jtbL.jpg) ## Available Options This product comes in different **Number of Items** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars More Power!! *by D***D on Reviewed in the United States on January 6, 2020* So much better than the recommended plugs for my car!! Better performance and better gas mileage!! They may wear a bit faster but overall most babe for your buck!! ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars unexpensive *by J***I on Reviewed in the United States on November 8, 2021* good brand and cheap ### ⭐⭐⭐⭐ 4.0 out of 5 stars Four Stars *by D***E on Reviewed in the United States on April 15, 2016* works great! --- ## 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/80034395-autolite-103-copper-resistor-automotive-replacement-spark-plugs-4-pack](https://www.desertcart.co.th/products/80034395-autolite-103-copper-resistor-automotive-replacement-spark-plugs-4-pack) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-24*