Detect Engine Knock Before It Becomes Engine Damage

Detonation can destroy an engine quickly—especially on turbocharged, supercharged, high-compression, or high-horsepower combinations.

The Link ECU G4 KnockLink Kit (G4KNLK) gives you a simple way to monitor engine knock using a dedicated knock sensor and Link's KnockLink visual monitoring system.

Designed for performance street cars, race cars, dyno tuning, and custom engine builds, the KnockLink provides an additional layer of information when you're pushing an engine closer to its limits.

Real-Time Visual Knock Monitoring

The KnockLink monitors the signal generated by the engine-mounted knock sensor and provides the driver or tuner with a visual indication of detected knock activity.

This makes it useful for identifying potential detonation during:

• Wide-open-throttle pulls
• Dyno tuning
• Boost tuning
• Ignition timing optimization
• Track sessions
• High-load driving
• Fuel-quality changes
• Testing new engine combinations

Instead of relying only on what you can hear, the KnockLink gives you another tool for monitoring what is happening inside the engine.

Especially Valuable on Boosted Engines

As boost pressure, cylinder pressure, and ignition timing increase, the margin between making power and experiencing detonation becomes smaller.

Knock monitoring is particularly useful for:

• Turbocharged engines
• Supercharged engines
• High-compression naturally aspirated engines
• E85 builds
• Race-fuel applications
• High-horsepower street cars
• Dyno tuning
• Drag racing
• Road racing
• Engine development

Complete Kit With Sensor & Loom

This version of the G4 KnockLink includes the knock sensor and wiring loom, giving you the core components required for a clean installation.

Kit Includes

• Link ECU G4 KnockLink unit
• Knock sensor
• Knock sensor wiring loom
• Required connectors as supplied with the kit

Key Features

• Genuine Link ECU knock monitoring system
• Real-time visual knock indication
• Knock sensor included
• Wiring loom included
• Compact KnockLink display
• Useful during dyno and road tuning
• Great additional monitoring tool for boosted applications
• Suitable for performance street and motorsport vehicles
• Helps identify potentially damaging detonation
• Ideal for standalone ECU and custom engine installations

A Valuable Tool for Tuners and Performance Enthusiasts

Knock can be difficult to accurately identify by ear—especially on a dyno or inside a loud race car where exhaust, valvetrain, transmission, and drivetrain noise can mask combustion-related sounds.

The Link ECU G4 KnockLink gives you another source of information when evaluating ignition timing, boost pressure, fuel quality, and overall engine operation.

For tuners, it can be an additional tool during calibration.

For drivers, it can provide another level of awareness when operating a high-performance engine.

Important Installation & Tuning Note

Knock detection should never be treated as a substitute for proper ECU calibration.

Sensor mounting location, engine mechanical noise, knock frequency, fuel quality, ignition timing, air/fuel ratio, boost pressure, and other factors can affect knock detection.

The knock sensor should be installed correctly on the engine, and the system should be configured and interpreted appropriately for the application.

Protect the Engine You've Invested In

You can spend thousands of dollars building an engine, turbo system, fuel system, and standalone ECU package.

The Link ECU G4 KnockLink Kit (G4KNLK) adds a dedicated knock-monitoring solution to help you better understand what's happening when that engine is under load.

Includes KnockLink, knock sensor, and loom for a more complete installation.