Part # 117000400

PPE 2001-2004 (FED) GM 6.6L Duramax Three-Inch 304 Stainless Steel Down Pipe

$170.90 $189.99
By PPE

⚠ WARNING: Cancer & Reproductive Harm

California Proposition 65 Warning - P65warnings.ca.gov

The PPE 3-Inch 304 Stainless Steel Down Pipes are designed to enhance exhaust flow on GM 6.6L Duramax engines. Constructed from high-quality 304 stainless steel, these down pipes reduce backpressure, improve turbocharger efficiency, and increase overall engine performance, making them ideal for heavy-duty and high-performance applications.


Key Features:

  • High-Flow 3-Inch Design:
    Allows for greater exhaust flow, reducing backpressure and increasing horsepower and torque.

  • 304 Stainless Steel Construction:
    Made from durable, corrosion-resistant stainless steel, ensuring longevity and reliability even under extreme conditions.

  • Improved Turbo Efficiency:
    By reducing backpressure, these down pipes enhance turbo response, contributing to quicker spool times and improved throttle response.

  • Direct Fit for GM Duramax Engines:
    Designed specifically for GM 6.6L Duramax engines, allowing for a straightforward installation with OEM and aftermarket components.


Technical Specifications:

  • Material:
    High-grade 304 stainless steel for exceptional durability and corrosion resistance.

  • Diameter:
    3 inches, optimized for increased exhaust flow and reduced backpressure.

  • Compatibility:
    Suitable for GM 6.6L Duramax engines, perfect for performance upgrades.

  • Function:
    Enhances exhaust flow, reduces backpressure, and supports improved turbocharger efficiency.


Installation Notes:
The PPE 3-Inch 304 Stainless Steel Down Pipes are a direct-fit replacement for stock down pipes, making installation easy while providing immediate performance benefits. Ideal for Duramax owners looking to improve exhaust flow and turbo efficiency, especially in heavy-duty or high-performance settings.

Installation Guide

01-04 Duramax Three-Inch Down Pipe

Compatible Vehicles

2004 GMC Sierra 3500HD 8 Cyl 6.6 Liter Turbo
2004 GMC Sierra 2500HD 8 Cyl 6.6 Liter Turbo
2004 Chevrolet Silverado 3500HD 8 Cyl 6.6 Liter Turbo
2004 Chevrolet Silverado 2500HD 8 Cyl 6.6 Liter Turbo
2003 GMC Sierra 3500HD 8 Cyl 6.6 Liter Turbo
2003 GMC Sierra 2500HD 8 Cyl 6.6 Liter Turbo
2003 Chevrolet Silverado 3500HD 8 Cyl 6.6 Liter Turbo
2003 Chevrolet Silverado 2500HD 8 Cyl 6.6 Liter Turbo
2002 GMC Sierra 3500HD 8 Cyl 6.6 Liter Turbo
2002 GMC Sierra 2500HD 8 Cyl 6.6 Liter Turbo
2002 Chevrolet Silverado 3500HD 8 Cyl 6.6 Liter Turbo
2002 Chevrolet Silverado 2500HD 8 Cyl 6.6 Liter Turbo
2001 GMC Sierra 3500HD 8 Cyl 6.6 Liter Turbo
2001 GMC Sierra 2500HD 8 Cyl 6.6 Liter Turbo
2001 Chevrolet Silverado 3500HD 8 Cyl 6.6 Liter Turbo
2001 Chevrolet Silverado 2500HD 8 Cyl 6.6 Liter Turbo
PART # 117000400
UPC # 840171210279

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