Aftermarket gauges that track critical engine data

Bobby Clark

11/30/2025

Aftermarket gauges that track critical engine data — Image credit: RKTW extend via Unsplash

Tracking critical engine data is essential for optimizing performance and ensuring the longevity of your vehicle. Aftermarket gauges provide a reliable way to monitor various aspects of your engine’s health that standard dashboard indicators might not cover. Whether you’re an enthusiast or just looking to keep your vehicle in top condition, investing in these gauges can offer peace of mind and valuable insights.

Boost Pressure Gauge

A boost pressure gauge is crucial for anyone with a turbocharged or supercharged engine. It measures the amount of pressure generated within the intake manifold, helping you monitor your engine’s performance. Knowing your boost levels is essential for tuning and preventing engine damage caused by overboosting.

For example, vehicles like the Subaru WRX or Ford Mustang EcoBoost can greatly benefit from a boost pressure gauge. Popular options include the AutoMeter Boost Gauge, which provides precise readings and is easy to install. Maintaining optimal boost levels can enhance your vehicle’s efficiency and power output.

Exhaust Gas Temperature (EGT) Gauge

An EGT gauge is vital for those who want to keep an eye on their engine’s combustion process. It measures the temperature of the exhaust gases, providing insights into the engine’s performance and efficiency. Monitoring EGT can help prevent issues like overheating, which can lead to severe engine damage.

Vehicles like the Dodge Ram 2500 with a Cummins diesel engine often utilize EGT gauges to ensure safe operation. Brands such as AEM offer reliable EGT gauges that can help you keep your engine running smoothly and efficiently, especially under heavy loads.

Oil Pressure Gauge

The oil pressure gauge is a critical component for monitoring the health of your engine’s lubrication system. It ensures that the engine components are adequately lubricated, preventing wear and tear. Low oil pressure can be an early warning sign of potential engine problems.

Drivers of high-performance cars like the Chevrolet Corvette or the Nissan GT-R often use oil pressure gauges to maintain peak performance. The Prosport Oil Pressure Gauge is a popular choice, offering accurate readings and a sleek design that fits well in most dashboards.

Coolant Temperature Gauge

The coolant temperature gauge is essential for monitoring the engine’s cooling system. It provides real-time data on the coolant’s temperature, allowing you to detect overheating issues before they cause significant damage.

Cars like the Honda Civic Type R and Volkswagen Golf GTI benefit from accurate coolant temperature monitoring. The Defi Advance CR Water Temperature Gauge is a favored option among enthusiasts, offering precise measurements and a user-friendly interface.

Image Credit: Ivan Radic, via Wikimedia Commons, CC BY 2.0

Air/Fuel Ratio Gauge

An air/fuel ratio gauge is indispensable for tuning and achieving optimal engine performance. It measures the ratio of air to fuel in the combustion chamber, helping you maintain the right balance for efficiency and power.

Performance vehicles like the Mitsubishi Lancer Evolution and Subaru BRZ often rely on air/fuel ratio gauges. The AEM Wideband Air/Fuel Ratio Gauge is renowned for its accuracy and ease of use, making it a top choice for enthusiasts looking to fine-tune their engines.

Transmission Temperature Gauge

Monitoring transmission temperature is crucial for vehicles that frequently tow or operate under heavy loads. The transmission temperature gauge helps prevent overheating, which can lead to transmission failure.

Trucks like the Ford F-150 and Chevrolet Silverado often use transmission temperature gauges for added safety. The GlowShift Transmission Temperature Gauge offers precise readings and an easy installation process, making it a favorite among truck owners.

Fuel Pressure Gauge

The fuel pressure gauge is vital for ensuring that your engine receives the correct amount of fuel. It helps diagnose issues related to fuel delivery, such as clogged filters or failing fuel pumps.

High-performance vehicles like the BMW M3 and Audi S4 often feature fuel pressure gauges to maintain optimal engine function. The AutoMeter Fuel Pressure Gauge is a trusted option, providing accurate data and durability for long-term use.

Tachometer Gauge

A tachometer gauge measures engine RPM, offering insights into the engine’s speed and helping drivers shift gears at the right time. It is particularly useful for manual transmission vehicles and those engaged in motorsport activities.

Cars like the Mazda MX-5 Miata and Porsche 911 often benefit from precise tachometer readings. The Stack ST200 Series Tachometer is a popular choice, known for its reliability and easy-to-read display, making it a valuable tool for any driving enthusiast.