PPE 3" STAINLESS STEEL DOWNPIPE 117000424 | 2002-2004 6.6L Duramax LB7

Replace the restrictive factory downpipe on your 2001–2004 GM 6.6L Duramax with the PPE 117000424 3-Inch Stainless Steel Downpipe. Designed to eliminate the crushed oval section found in the OEM downpipe, this high-flow replacement features a smooth mandrel-bent design that improves exhaust flow and reduces restriction.

Constructed from premium 304 stainless steel, this downpipe is built to withstand years of exposure to heat, moisture, and harsh operating conditions. For enhanced thermal management, the downpipe is spiral wrapped with titanium woven heat wrap and secured with stainless steel clamps to help reduce underhood temperatures and improve heat retention within the exhaust system.

Designed specifically for California emissions-equipped vehicles, this downpipe provides improved durability and performance while maintaining emissions compliance.

Features:

• 3-inch mandrel-bent design for improved exhaust flow
• Replaces the restrictive factory crushed downpipe section
• Premium 304 stainless steel construction
• Titanium woven heat wrap included
• Stainless steel retaining clamps
• Improves exhaust system efficiency
• Corrosion-resistant construction for long service life
• Designed for California emissions-equipped vehicles

Emissions Compliance:

• CARB Executive Order: D-701-30

Fitment:

• 2001–2004 Chevrolet Silverado 2500HD/3500HD 6.6L Duramax LB7 (California Emissions)
• 2001–2004 GMC Sierra 2500HD/3500HD 6.6L Duramax LB7 (California Emissions)

Application Note:

• Designed specifically for trucks equipped with the California emissions package.
• California emissions-equipped trucks were sold throughout the United States and are not limited to California.