Billet Resonator Plug Cover Cap for GM Chevy Duramax 6.6L LBZ LLY LMM
EGR Performance Billet Resonator Cap for 2004.5-2010 Duramax Diesel
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Billet Resonator Plug Cover Cap for GM Chevy Duramax 6.6L LBZ LLY LMM
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Billet Resonator Adapter for Duramax 6.6L Turbo Diesel Mouthpiece

Billet Resonator Plug Cover Cap for GM for Chevy Duramax 6.6L Turbo Diesel 2004.5-2010 LBZ LLY LMM Mouthpiece

$19.99
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Details
Year
Vehicle
Engine
Engine Spec
2004.5-2006
GM/Chevy
LLY
6.6L Turbo Diesel
2006-2007.5
GM/Chevy
LBZ
6.6L Turbo Diesel
2007.5-2010
GM/Chevy
LMM
6.6L Turbo Diesel
The Billet Resonator Plug Cover Cap for GM Chevy Duramax 6.6L Turbo Diesel 2004.5-2010 LBZ LLY LMM Mouthpiece by EGR Performance is a premium upgrade, designed to boost performance, save under-hood space, and elevate your engine bay’s custom look—perfectly fitting your Duramax diesel vehicle.
Shipping Details

Ontario CA / Springdale OH / Newark NJ
Package List
  • 1 x Billet Resonator Adapter (main plug cover cap)
  • 2 x O-rings (for secure, airtight installation)
Delivery Time

2-5 working days inland in the United States

Product details

Product Overview

Crafted exclusively for GM and Chevy 6.6L Duramax Turbo Diesel engines (2004.5-2010, LBZ/LLY/LMM models), this billet resonator plug cover cap replaces the stock resonator to deliver functional and aesthetic upgrades. Manufactured by EGR Performance, it combines durability, performance, and style for Duramax enthusiasts.

Ideal For

  • GM/Chevy owners with 6.6L Duramax Turbo Diesel engines (2004.5-2010)
  • LBZ, LLY, and LMM engine models needing a resonator upgrade
  • Enthusiasts wanting to enhance intake sounds and clean up the engine bay
  • Drivers seeking a corrosion-resistant, long-lasting engine accessory
  • Anyone looking for a custom aesthetic for their Duramax engine bay

Specifications

  • Brand: EGR Performance
  • Material: High-Quality Billet Aluminum
  • Compatibility: GM/Chevy 6.6L Duramax Turbo Diesel 2004.5-2010 (LBZ/LLY/LMM)
  • Warranty: 1 Year
  • Installation: No installation instructions included
  • Seal: 2 O-rings for airtight fit

Core Advantages

  • Enhanced Intake Sound: Greatly increases intake sounds for a more aggressive, sporty engine note, elevating your driving experience.
  • Space-Saving Design: Saves valuable room under the hood, simplifying engine bay maintenance and creating a cleaner look.
  • Custom Aesthetic: Gives your Duramax 6.6L engine bay a sleek, customized appearance that stands out from stock setups.
  • Superior Durability: Made of high-quality billet aluminum with strong corrosion resistance, built to withstand under-hood heat and harsh conditions.
  • Secure Fit: Includes two O-rings for a tight, airtight seal—prevents air leaks and ensures reliable performance.
  • 1-Year Warranty: Backed by EGR Performance’s 1-year warranty, providing peace of mind for your purchase.

Technical Specifications

  • Material: High-grade billet aluminum (corrosion-resistant, rust-proof, heat-resistant)
  • Fitment: Designed for GM/Chevy 6.6L Duramax Turbo Diesel mouthpiece (2004.5-2010, LBZ/LLY/LMM)
  • Seals: 2 O-rings (food-grade, leak-proof, durable)
  • Product Type: Billet Resonator Plug Cover Cap (resonator adapter)
  • Manufacturer: EGR Performance
  • Warranty: 12 months (from purchase date)
  • Customer Support: service@egrperformance.com

Why Choose This Billet Resonator Plug Cover Cap?

For GM/Chevy Duramax 6.6L Turbo Diesel (2004.5-2010 LBZ/LLY/LMM) owners, this EGR Performance resonator plug cover cap is the top choice for unbeatable performance, style, and reliability.

  • Brand Reliability: EGR Performance specializes in Duramax accessories, delivering high-quality, tested parts for diesel engines.
  • Perfect Compatibility: Engineered specifically for 2004.5-2010 LBZ, LLY, LMM models—ensures a seamless fit with your Duramax mouthpiece.
  • All-in-One Upgrade: Boosts intake sound, saves space, and enhances engine bay style—no extra parts needed.
  • Low Maintenance: Corrosion-resistant billet aluminum requires no extra upkeep, keeping your engine bay looking clean for years.
  • Dedicated Support: Contact our team at service@egrperformance.com for any questions or warranty concerns.

Complete Package Contents

  • 1 x Billet Resonator Adapter (main plug cover cap)
  • 2 x O-rings (for secure, airtight installation)
  • Note: No installation instructions are included

Compatibility List

This billet resonator plug cover cap is 100% compatible with the following GM/Chevy Duramax models, ensuring a perfect fit:

  • GM/Chevy 6.6L Duramax Turbo Diesel Engines (2004.5-2010)
  • Chevy Silverado 2500HD/3500HD (2004.5-2006) with LLY 6.6L Duramax Turbo Diesel
  • GMC Sierra 2500HD/3500HD (2004.5-2006) with LLY 6.6L Duramax Turbo Diesel
  • Chevy Silverado 2500HD/3500HD (2006-2007.5) with LBZ 6.6L Duramax Turbo Diesel
  • GMC Sierra 2500HD/3500HD (2006-2007.5) with LBZ 6.6L Duramax Turbo Diesel
  • Chevy Silverado 2500HD/3500HD (2007.5-2010) with LMM 6.6L Duramax Turbo Diesel
  • GMC Sierra 2500HD/3500HD (2007.5-2010) with LMM 6.6L Duramax Turbo Diesel

Compatibility List

This billet resonator plug cover cap is 100% compatible with the following GM/Chevy Duramax models, ensuring a perfect fit:

  • GM/Chevy 6.6L Duramax Turbo Diesel Engines (2004.5-2010)
  • Chevy Silverado 2500HD/3500HD (2004.5-2006) with LLY 6.6L Duramax Turbo Diesel
  • GMC Sierra 2500HD/3500HD (2004.5-2006) with LLY 6.6L Duramax Turbo Diesel
  • Chevy Silverado 2500HD/3500HD (2006-2007.5) with LBZ 6.6L Duramax Turbo Diesel
  • GMC Sierra 2500HD/3500HD (2006-2007.5) with LBZ 6.6L Duramax Turbo Diesel
  • Chevy Silverado 2500HD/3500HD (2007.5-2010) with LMM 6.6L Duramax Turbo Diesel
  • GMC Sierra 2500HD/3500HD (2007.5-2010) with LMM 6.6L Duramax Turbo Diesel
  1. Dispatch Time: Orders will be shipped within 24 hours after successful payment.
  2. Delivery Time: 2-5 business days after dispatch (delivery speed depends on proximity to warehouse location).
  3. Return Window:7 days for unsatisfactory items45 days for quality-related issues
  4. Refund Processing: Refunds will be processed back to your original payment method within 2-4 business days after receiving the automated refund confirmation email (subject to bank verification).

Q1: Will this billet resonator plug cover cap fit my 2006 Chevy Duramax 6.6L LBZ?

A: Yes! This Billet Resonator Plug Cover Cap is specifically designed for GM/Chevy 6.6L Duramax Turbo Diesel engines, including the 2006 LBZ model. It fits perfectly with the factory mouthpiece.

Q2: Does the EGR Performance resonator plug cap increase intake sound?

A: Absolutely! One of the key benefits of this Duramax 6.6L resonator plug cover cap is that it greatly increases intake sounds, giving your engine a more aggressive, sporty note.

Q3: What material is the billet resonator plug cover cap made of?

A: It is made of high-quality billet aluminum, which offers excellent corrosion resistance, durability, and heat resistance—perfect for under-hood conditions of GM/Chevy Duramax LBZ/LLY/LMM models.

Q4: Is installation instructions included with the package?

A: No, installation instructions are not included. For any installation questions, please contact our customer support at service@egrperformance.com.

Q5: Does this product come with a warranty?

A: Yes! The EGR Performance Billet Resonator Plug Cover Cap for GM Chevy Duramax 6.6L comes with a 1-year warranty from the date of purchase.

Q6: Will this resonator plug cap save space under my Duramax hood?

A: Yes! Its space-saving design reduces clutter under the hood, making maintenance easier and giving your 2004.5-2010 Duramax engine bay a cleaner, more custom look.

Q7: Are O-rings included for installation?

A: Yes, the package includes 2 O-rings to ensure an airtight, leak-free fit for your GM/Chevy Duramax 6.6L Turbo Diesel (LBZ/LLY/LMM) mouthpiece.

Q8: Is this product compatible with LMM Duramax models (2007.5-2010)?

A: Yes, this billet resonator plug cover cap is fully compatible with 2007.5-2010 LMM 6.6L Duramax Turbo Diesel engines, as well as LLY and LBZ models.

Q9: How do I contact customer support for this product?

A: For any questions, concerns, or warranty claims, please email our customer support team at service@egrperformance.com.

Q10: Will this plug cap work with the stock mouthpiece of my Duramax?

A: Yes! It is designed to fit the factory mouthpiece of GM/Chevy 6.6L Duramax Turbo Diesel engines (2004.5-2010 LBZ/LLY/LMM) without any modifications.