--- product_id: 41975810 title: "Autolite 437 Copper Non-Resistor Automotive Replacement Spark Plugs (4 Pack)" brand: "autolite iridium ultra" price: "€ 47.10" currency: EUR in_stock: false reviews_count: 13 url: https://www.desertcart.hr/products/41975810-autolite-437-copper-non-resistor-automotive-replacement-spark-plugs-4 store_origin: HR region: Croatia --- # Boosts fuel efficiency & smooth acceleration Full copper core for max thermal conductivity Leak-proof copper-glass seal for durability Autolite 437 Copper Non-Resistor Automotive Replacement Spark Plugs (4 Pack) **Brand:** autolite iridium ultra **Price:** € 47.10 **Availability:** ❌ Out of Stock ## Summary > ⚡ Ignite your drive with Autolite’s copper core power! ## Quick Answers - **What is this?** Autolite 437 Copper Non-Resistor Automotive Replacement Spark Plugs (4 Pack) by autolite iridium ultra - **How much does it cost?** € 47.10 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/41975810-autolite-437-copper-non-resistor-automotive-replacement-spark-plugs-4) ## 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 - • **Trusted Legacy:** Backed by Autolite’s 80+ years of innovation, these plugs combine performance and value for the discerning driver. - • **Fuel-Smart Ignition:** Delivers quick starts, improved fuel economy, and smooth acceleration to keep you ahead on the road. - • **Unmatched Durability:** Heat-fused internal seal and leak-proof copper-glass bonding guarantee long-lasting spark plug integrity. - • **Precision Engineering:** Cold-formed steel shell with rolled threads and multi-rib insulator reduces misfires and enhances strength. - • **Peak Thermal Performance:** Full copper core electrode ensures superior heat transfer for reliable ignition in all conditions. ## Overview Autolite 437 Copper Non-Resistor Spark Plugs feature a full copper core electrode for superior thermal conductivity, a leak-proof copper-glass seal for enhanced durability, and precision construction that ensures quick starts, better fuel efficiency, and smooth acceleration. Trusted since 1936, these plugs deliver reliable performance tailored for vehicle-specific fits. ## 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. Review: Great quality and fit - Perfect replacement for my tractor. Works so much better than the 15 year old ones in the tractor. Review: Dad - Worked well ## 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 | |---------------|-------| | ASIN | B000CBQUJC | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #702,924 in Automotive ( See Top 100 in Automotive ) #3,799 in Automotive Replacement Spark Plugs | | Brand | Autolite Iridium Ultra | | Brand Name | Autolite Iridium Ultra | | Compatible with Vehicle Type | Motorcycle | | Core Material | Copper | | Customer Reviews | 4.8 out of 5 stars 535 Reviews | | Gap Size | 2 Inches | | Global Trade Identification Number | 00009100004130 | | Included Components | 4 spark plugs | | Item Type Name | Copper Non-Resistor Spark Plug | | Item Weight | 8 Ounces | | Manufacturer | FRAM | | Manufacturer Part Number | 437-4PK | | Manufacturer Warranty Description | Lifetime Limited Warranty | | Model Number | 437-4PK | | OEM Equivalent Part Number | 437-4PK | | Thread Size | M14-1.25mm | | Top Material Type | Alloy Steel | | UPC | 009100004130 | | Unit Count | 4.0 Count | | Vehicle Service Type | Motorcycle | ## Product Details - **Brand:** Autolite Iridium Ultra - **Core Material:** Copper - **Thread Size:** M14-1.25mm - **Top Material Type:** Alloy Steel - **Vehicle Service Type:** Motorcycle ## Images ![Autolite 437 Copper Non-Resistor Automotive Replacement Spark Plugs (4 Pack) - Image 1](https://m.media-amazon.com/images/I/71-GAahSRNL.jpg) ![Autolite 437 Copper Non-Resistor Automotive Replacement Spark Plugs (4 Pack) - Image 2](https://m.media-amazon.com/images/I/61zx25-cqlL.jpg) ![Autolite 437 Copper Non-Resistor Automotive Replacement Spark Plugs (4 Pack) - Image 3](https://m.media-amazon.com/images/I/71sRR+tS62L.jpg) ![Autolite 437 Copper Non-Resistor Automotive Replacement Spark Plugs (4 Pack) - Image 4](https://m.media-amazon.com/images/I/71MGX4XYJQL.jpg) ![Autolite 437 Copper Non-Resistor Automotive Replacement Spark Plugs (4 Pack) - Image 5](https://m.media-amazon.com/images/I/71OdKPYQstL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great quality and fit *by A***S on January 2, 2026* Perfect replacement for my tractor. Works so much better than the 15 year old ones in the tractor. ### ⭐⭐⭐⭐⭐ Great deal on spark plugs *by K***R on November 16, 2025* Nice spark plugs, priced right, well packaged, and fast shipping. ### ⭐⭐⭐⭐⭐ Works great! *by T***L on February 15, 2025* Installed in my 1939 9n that needed a little hotter plug. Starts and runs like a new tractor. --- ## 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/41975810-autolite-437-copper-non-resistor-automotive-replacement-spark-plugs-4](https://www.desertcart.hr/products/41975810-autolite-437-copper-non-resistor-automotive-replacement-spark-plugs-4) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-06-08*