Unlocking Performance: Grid Heater Delete Kit for 6.7 Cummins & High-Flow Intake Horn Upgrade

Airflow is a crucial factor for diesel enthusiasts and truck owners looking to maximize the potential of their 6.7L Cummins engine. The grid heater delete kit 6.7 Cummins and a performance intake horn are two significant upgrades. These modifications help eliminate restrictions, increase power, and reduce potential failure points in the engine’s air intake system.

This article will explore why these upgrades are beneficial, how they work, and what to expect during installation.

Understanding the Grid Heater in a 6.7 Cummins

The grid heater is a factory-installed component in the intake manifold designed to assist with cold starts. It warms incoming air to help fuel combustion in low temperatures, making winter starts easier. However, despite its intended benefits, the grid heater presents several drawbacks, especially for performance-minded drivers.

Why Delete the Grid Heater?

1. Restrictive Airflow – The grid heater and mounting bolts create turbulence, restricting airflow and reducing engine efficiency.
2. Bolt Failure Risk – In some cases, the grid heater bolts have been known to break off, leading to catastrophic engine damage.
3. Carbon Buildup – Over time, soot and carbon can accumulate on the grid heater, further restricting air intake.
4. Alternative Cold Start Solutions – Many Cummins owners in mild climates or with block heaters don’t need a grid heater at all.

By installing a grid heater delete kit, you can eliminate these risks and unlock better airflow, improving performance across the RPM range.

Benefits of a Grid Heater Delete Kit

A grid heater delete kit removes the heating element and replaces it with a smooth, open passageway. Here’s what you gain:

Increased Airflow – Removing obstructions results in smoother, unrestricted airflow to the cylinders.
Lower Intake Temperatures – The absence of the heating element prevents unnecessary heat buildup in the intake manifold.
Improved Throttle Response – Enhanced air delivery allows for more precise throttle control.
More Reliable Engine Operation – Eliminating the grid heater bolt failure risk protects your engine from internal damage.

How an Upgraded 6.7 Cummins Intake Horn Enhances Airflow

While removing the grid heater improves airflow inside the intake manifold, the intake horn is another crucial component that can further optimize air delivery.

What Does the Intake Horn Do?

The intake horn directs pressurized air from the intercooler into the intake manifold. The factory intake horn is often restrictive, limiting airflow and causing turbulence before the air reaches the cylinders.

Why Upgrade the Intake Horn?

1. More Efficient Airflow – Performance intake horns have a larger diameter and optimized internal design, reducing resistance.
2. Better Turbo Response – Faster, smoother airflow helps reduce turbo lag, making the engine more responsive.
3. Increased Power & Torque – More air reaching the cylinders leads to improved combustion and increased horsepower.
4. Supports Other Performance Mods—If you have an upgraded turbo or intercooler, a high-flow intake horn helps maximize its benefits.

When combined with a grid heater delete kit, a performance intake horn helps create a seamless and efficient air intake system, unlocking the full potential of your Cummins engine.

Installation Guide: Grid Heater Delete & Intake Horn

Tools & Parts Needed

Ratchet Set
Torque Wrench
Gasket Sealant
Grid Heater Delete Kit
Performance Intake Horn
Replacement Gaskets

Installation Process

1. Disconnect the Batteries – Ensure safety by removing power from the system.
2. Remove the Factory Intake Horn – Unbolt the stock intake horn from the manifold and intercooler pipe.
3. Access the Grid Heater – Once the intake horn is removed, you’ll have clear access to the grid heater.
4. Unbolt and Remove the Grid Heater – Carefully remove the grid heater and ensure no debris falls into the intake manifold.
5. Install the Grid Heater Delete Plate – Secure it using the provided gasket and torque it to specifications.
6. Install the New Intake Horn – Attach the high-flow intake horn and reconnect the intercooler piping.
7. Reconnect Sensors & Battery – Double-check all connections before starting the engine.

Pro Tip: After installing a grid heater delete kit, it’s recommended to use a tuning solution to prevent check engine lights and optimize fuel-air ratios.

Who Should Consider These Upgrades?

While both modifications offer great benefits, they may not be ideal for every truck owner. Here’s who can benefit most from these upgrades:

Performance Enthusiasts – These mods are a great choice if you want more power, better airflow, and improved throttle response.
Towing & Hauling Applications – Unrestricted airflow can help maintain EGTs (Exhaust Gas Temperatures) under load.
Warmer Climates—If you rarely drive in subzero temperatures, a grid heater delete will not impact cold starts.

Not Ideal for Extreme Cold Weather – If you frequently drive in freezing conditions, you may need an alternative cold-start solution, like a block heater.

Final Thoughts: Is a Grid Heater Delete Kit & Intake Horn Worth It?

For Cummins owners looking to maximize airflow and performance, a grid heater delete kit and high-flow intake horn are two of the best upgrades. Removing airflow restrictions and ensuring smooth intake flow, these modifications help boost horsepower, improve throttle response, and protect your engine from potential failures.

Whether you’re towing, racing, or simply want a more responsive truck, upgrading your 6.7 Cummins intake horn is a proven way to get more out of your diesel engine.