Tuner Harness Plug Kits

What Is a Tuner Harness Plug Kit?

A Tuner Harness Plug Kit protects factory sensor connections after the installation of off-road performance components like an EGR or DPF delete. It allows the ECU to maintain integrity without the presence of removed emissions components.

By properly terminating unused sensor connections, it prevents debris from entering the system and helps avoid phantom fault codes caused by moisture in the harness.

Why Your Modified Truck Needs a Plug Kit

The Hidden Dangers: Why You Can't Just "Tape It Up"

Ignoring exposed connectors is a costly mistake. Electrical tape eventually peels, allowing moisture to wick into the copper wiring. This "capillary action" can carry water directly to the ECM, leading to catastrophic failure.

• Prevents Corrosion: Stops "green death" (copper oxidation) before it starts.
• Professional Finish: Our compatible Shibby-style kits transform a messy harness into a showroom-ready engine bay.
• Seals Out Debris: Keeps mud, dust, and road salt out of critical connector points.

Compatibility Guide: Find Your Perfect Fit

We stock high-quality kits for every major diesel platform.

• Ram Owners: Protection for 6.7 Cummins wiring harnesses and EcoDiesel tuner harness plug kits.
• Chevy/GMC Owners: Specific LML and L5P Duramax options designed to match GM's complex wiring.
• Ford Owners: Watertight 6.7 Powerstroke tuner harness plug kits tailored for your specific model year.

Quick and Reversible Installation

Installation typically takes under 30 minutes. These kits feature an Easy Snap-Fit Design that clicks into your Cummins, EcoDiesel, Duramax, or Powerstroke harness—no special tools or wire cutting required. If you ever need to return to factory stock, simply unclip the plugs to reveal pristine connectors.

Why Choose EGR Performance?

• High-Heat Resistance: Our kits (including Shibby-compatible designs) are crafted from automotive-grade, thermal-resistant materials to withstand engine bay temperatures.
• Precision Engineering: Every diesel tuning harness plug is tested to ensure a watertight, dust-proof seal that meets or exceeds industry standards.
• Expert Support: We specialize in 6.7 Cummins, EcoDiesel, Duramax, and Powerstroke performance. We provide the expertise you won't find with generic sellers.

*Note: Shibby Engineering is a registered trademark. EGR Performance is not affiliated with Shibby Engineering; brand names are used for compatibility identification purposes only.

Frequently Asked Questions

Will this plug kit fit my specific truck?

Yes, tuner harness plug kits are vehicle-specific. We offer kits for the Dodge Ram Cummins 6.7L (2009.5-2024), 3.0L EcoDiesel (2011-2025), Ford Powerstroke 6.7L (2011-2025), and GM Duramax 6.6L. Check our compatibility list to ensure a perfect fit.

What does the kit protect?

These kits shield your diesel tuning harness from moisture, salt, and dirt. They are essential for preventing harness wicking, where water enters a connector and travels to the ECM, causing thousands of dollars in damage.

What is included in the kit?

A standard Shibby-compatible plug kit includes labeled connector caps that snap directly over factory harness ends. Note: DEF tank plugs may be sold separately depending on the kit configuration.

Should I use dielectric grease?

Absolutely. We highly recommend applying dielectric grease to your terminals before installation. This adds an extra layer of protection against corrosion for your Cummins, Powerstroke, or Duramax engine.

Are these plugs removable?

Yes. The snap-fit design allows for damage-free removal, keeping your factory connectors clean and ready for reuse if you ever return the vehicle to stock configuration.