{"product_id":"temperature-sensor","title":"Holley EFI 534-2 Coolant Temperature Sensor - 3\/8\" NPT Analog for Pro-Jection Systems","description":"\u003cdiv style=\"background:#f7f7f7;border-left:4px solid #c00000;padding:14px 18px;margin:0 0 18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;font-size:1.1em;\"\u003eAbout Holley EFI\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003eHolley EFI engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Holley EFI lineup with fast shipping and expert fitment support — order with confidence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eHolley EFI 534-2 Electric Coolant Temperature Sensor for Pro-Jection Systems\u003c\/h2\u003e\u003cp\u003eMaintain optimal engine health and performance with the Holley EFI 534-2 Electric Coolant Temperature Sensor. This high-quality sending unit is specifically designed to provide accurate, real-time coolant temperature readings for Holley Pro-Jection EFI systems. Essential for preventing overheating and ensuring your engine operates within its ideal thermal range, this sensor is a critical component for any performance or daily driver application. Accurate temperature data is vital for proper fuel mapping and ignition timing, directly impacting your vehicle's efficiency and longevity.\u003c\/p\u003e\u003ch3\u003eReliable Temperature Monitoring and Engine Protection\u003c\/h3\u003e\u003cp\u003eThe 534-2 temperature sensor is engineered for precision and durability, offering:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccurate Coolant Temperature Readings:\u003c\/strong\u003e Provides precise analog signals to your gauge or EFI system, ensuring you're always aware of your engine's thermal status. This real-time feedback allows for proactive adjustments and prevents potential damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3\/8\" NPT Thread Size:\u003c\/strong\u003e Features a common 3\/8-inch NPT thread for straightforward installation into most engine blocks, cylinder heads, or coolant passages, making it a versatile choice for various setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Brass Construction:\u003c\/strong\u003e Crafted from high-quality brass for excellent corrosion resistance and long-term reliability, even in the most demanding engine environments. Its robust build ensures consistent performance over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned for Holley Pro-Jection:\u003c\/strong\u003e Optimized for seamless integration and accurate data reporting specifically with Holley Pro-Jection EFI systems, guaranteeing compatibility and peak functionality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectric Sending Unit:\u003c\/strong\u003e Delivers a consistent and stable electrical signal, crucial for reliable gauge operation and accurate data interpretation by your ECU.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProtect Your Investment with Precision Monitoring\u003c\/h3\u003e\u003cp\u003eOverheating can lead to severe engine damage, from warped cylinder heads to catastrophic component failure, making an accurate coolant temperature sensor indispensable. The Holley EFI 534-2 ensures that your engine's cooling system is effectively monitored, allowing you to react quickly to any temperature fluctuations. This proactive approach to engine management not only extends the life of your valuable components but also helps maintain peak performance and fuel efficiency.\u003c\/p\u003e\u003ch3\u003eThe Smart Choice for Holley Pro-Jection Users\u003c\/h3\u003e\u003cp\u003eFor those running a Holley Pro-Jection system, the 534-2 temperature sensor is the ideal choice for reliable and accurate coolant monitoring. Its robust design, precise functionality, and easy installation make it a smart investment for protecting your engine and optimizing its performance. Trust in Holley's commitment to quality and find this essential sensor and other premium EFI components at GGCRACING.\u003c\/p\u003e\n\u003cdiv style=\"margin:24px 0;border-top:1px solid #eee;padding-top:18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOften bought with\u003c\/h3\u003e\n\u003cp style=\"font-size:0.9em;color:#555;margin:0 0 8px;\"\u003eOther popular Holley EFI products customers consider together:\u003c\/p\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/efi-pro-digital-dash-w-6-86in-screen\" style=\"color:#0066cc;text-decoration:none;\"\u003eHolley EFI Pro Digital Dash 6.86in Touchscreen — Universal Upgrade\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/pro-digital-dash-panel\" style=\"color:#0066cc;text-decoration:none;\"\u003eHolley EFI Pro Digital Dash Panel Assembly — Programmable Gauge Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/efi-dash-7-dash-bezel-62-65-nova\" style=\"color:#0066cc;text-decoration:none;\"\u003eHolley EFI Dash Bezel for 62-65 Chevy Nova — Black Plastic\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/smart-coil-kit-8-cyl\" style=\"color:#0066cc;text-decoration:none;\"\u003eHolley EFI Smart Coil Kit 8-Cylinder — E-Core Coil-Near-Plug with Wiring Harness\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/bbf-fe-efi-hyperspark-distributor\" style=\"color:#0066cc;text-decoration:none;\"\u003eHolley EFI Hyperspark Distributor - Ford FE-Series Big Block Sniper EFI Compatible\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Holley EFI 534-2 Coolant Temperature Sensor - 3\/8\\\" NPT Analog for Pro-Jection Systems\",\"description\":\"Monitor your engine's coolant temperature accurately with the Holley EFI 534-2 electric sending unit. 3\/8\\\" NPT brass sensor for Pro-Jection systems. 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Contact our experts at GGCRACING with your VIN and we'll verify before you order.\"}},{\"@type\":\"Question\",\"name\":\"How long is shipping for Holley EFI?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.\"}},{\"@type\":\"Question\",\"name\":\"How do I install the Holley EFI 534-2 Coolant Temperature Sensor - 3\/8\\\" NPT Analog for Pro-Jection Sy?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most installs are bolt-on with basic hand tools. 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