3" Turbo Duramax Downpipe for 2004.5-2010 LLY LBZ LMM 6.6L
EGR Performance Duramax Downpipe fit Chevy Silverado 2500/3500
6.6L Duramax Downpipe – 20% Greater Flow Over Stock
Direct Bolt-On Duramax Downpipe for GMC Sierra 2500/3500
3" Turbo Duramax Downpipe for 2004.5-2010 LLY LBZ LMM 6.6L
EGR Performance Duramax Downpipe fit Chevy Silverado 2500/3500
6.6L Duramax Downpipe – 20% Greater Flow Over Stock
Direct Bolt-On Duramax Downpipe for GMC Sierra 2500/3500

For 2004.5-2010 LLY LBZ LMM 6.6L Duramax Downpipe Exhaust

$115.79
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Details
3" Turbo Downpipe for 2004.5-2010 LLY LBZ LMM 6.6L Duramax – Boost your diesel truck’s performance with the EGR Performance Duramax Downpipe, engineered for seamless fit and maximum exhaust efficiency on Chevy Silverado and GMC Sierra 2500/3500 models.

 
Shipping Details

Ontario CA
Package List
Delivery Time

2-5 working days inland in the United States

Product details

Product Overview

This 100% brand-new 6.6L Duramax Downpipe is a premium upgrade for 2004.5-2010 LLY, LBZ, and LMM engines. Designed by EGR Performance, it delivers enhanced airflow, horsepower gains, and a richer diesel sound without compromising your truck’s DPF or urea system. Crafted with top-notch materials, this downpipe ensures durability, no leaks, and long-lasting performance.

Ideal For

  • Chevy Silverado 2500 owners with 6.6L Duramax Turbo Diesel (05/2004-2010)
  • Chevy Silverado 3500 drivers seeking performance upgrades for LLY/LBZ/LMM engines
  • GMC Sierra 2500/3500 enthusiasts wanting improved exhaust flow and sound
  • Off-road enthusiasts looking for reliable, bolt-on Duramax parts

Specifications

  • Pipe Diameter: 3" Turbo Downpipe
  • Construction: Top-notch, leak/crack-resistant material
  • Fit Type: Direct bolt-on (no modifications needed)
  • Heat Retention: Greater heat retention than stock
  • Flow Improvement: 20% greater flow over OEM downpipe

Core Advantages

  • Horsepower & Torque Gains: Adds +10-15 HPS to your 6.6L Duramax engine, with noticeable torque improvement
  • Plug-and-Play Installation: Direct fit for 2004.5-2010 LLY/LBZ/LMM models – no cutting or drilling required
  • Optimized Airflow: Maximizes smooth exhaust airflow, reducing backpressure for better engine efficiency
  • Rich Diesel Sound: Enhances exhaust note without being overly loud, perfect for diesel enthusiasts
  • System Compatibility: Will not affect DPF or urea system, preserving your truck’s emissions setup
  • 1-Year Warranty: Backed by EGR Performance’s quality guarantee for peace of mind

Technical Specifications

  • Brand: EGR Performance
  • Condition: 100% Brand New (never used or installed)
  • Flow Rate: 20% higher than stock downpipe
  • Power Gain: +10-15 HPS
  • Installation: Professional installation recommended (no instruction included)
  • Warranty: 1-year manufacturer warranty

Why Choose This EGR Performance Duramax Downpipe?

When upgrading your 2004.5-2010 LLY/LBZ/LMM 6.6L Duramax, quality and fit matter. EGR Performance’s downpipe stands out with:

  • Premium materials that resist leaks, cracks, and heat damage
  • Engineered for exact compatibility with Chevy Silverado and GMC Sierra 2500/3500
  • Performance gains you can feel, without sacrificing emissions compliance (for non-CARB states)
  • Dedicated customer support via service@egrperformance.com
  • Off-road-ready design built for durability in tough conditions

Complete Package Contents

  • 1 x 3" Turbo Downpipe (for 2004.5-2010 LLY LBZ LMM 6.6L Duramax)
  • No installation instructions (professional installation recommended)

Compatibility List

This downpipe is exclusively compatible with the following vehicles (6.6L Duramax Turbo Diesel engine only):

  • Chevy Silverado 2500: 05/2004 – 2010
  • Chevy Silverado 3500: 05/2004 – 2010
  • GMC Sierra 2500: 05/2004 – 2010
  • GMC Sierra 3500: 05/2004 – 2010

Important Note

Not for sale or street use on licensed vehicles in California, New York, or other CARB-compliant states. All EGR Performance downpipes are deemed for off-road use only.

  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).

Q: Will this downpipe fit my 2006 Chevy Silverado 2500 6.6L Duramax?

A: Yes! This 3" Duramax Downpipe is fully compatible with 2004.5-2010 Chevy Silverado 2500 models equipped with the 6.6L LLY/LBZ/LMM Duramax Turbo Diesel engine.

Q: Does this downpipe require modifications to install?

A: No. It’s a direct bolt-on LLY LBZ LMM downpipe – no cutting, drilling, or custom modifications are needed. Professional installation is still recommended for best results.

Q: Will installing this downpipe affect my DPF or urea system?

A: No. The EGR Performance downpipe is engineered to work with your truck’s existing DPF and urea system, so it won’t disrupt emissions components or cause warning lights.

Q: What kind of performance gains can I expect?

A: You’ll see +10-15 HPS gains, improved torque, and 20% greater exhaust flow compared to the stock downpipe. It also enhances airflow efficiency to reduce engine backpressure.

Q: Is this downpipe legal for street use?

A: No. This downpipe is for off-road use only and is not legal for street use on licensed vehicles in California, New York, or other CARB-compliant states.

Q: Does this product come with a warranty?

A: Yes. Every EGR Performance 6.6L Duramax downpipe includes a 1-year manufacturer warranty against defects, leaks, or cracks.

Q: Will this downpipe change my truck’s exhaust sound?

A: Yes! It delivers a richer, more aggressive diesel sound without being excessive. Perfect for enthusiasts wanting to enhance their Duramax’s audio profile.

Q: Is installation hardware included with the downpipe?

A: The package includes 1 x 3" Turbo Downpipe only. Installation hardware (if needed) is not included – professional installers typically use OEM or aftermarket hardware for fitment.

Q: Can I install this downpipe myself?

A: While it’s a direct fit, professional installation is highly recommended. No instruction manual is included, so experience with Duramax exhaust systems is helpful. Contact service@egrperformance.com for installation tips.

Q: What material is this downpipe made of?

A: It’s crafted from top-notch, high-quality materials designed to resist heat, leaks, and cracks – ensuring long-lasting performance for your 2004.5-2010 Duramax truck.

Q: Will this downpipe work with my GMC Sierra 3500 2010 Duramax?

A: Absolutely. This downpipe is compatible with 2004.5-2010 GMC Sierra 3500 models with the 6.6L LLY/LBZ/LMM Duramax Turbo Diesel engine.