The Bridge and Cold Side Intercooler Pipe is a bolt-on upgrade for the 2004.5-2005 GM 6.6L Duramax LLY. This 3-inch mandrel-bent pipe flows 53% more air than the factory unit and directly improves charge air delivery from the intercooler to the intake, supporting stronger boost reliability and cleaner engine breathing. Designed to restore factory durability or enhance performance, this cold side pipe eliminates the restrictive factory design that can lead to boost loss and leaks under load.

Fitment

• 2004.5–2005 Chevrolet Silverado 2500HD/3500HD — 6.6L Duramax LLY
• 2004.5–2005 GMC Sierra 2500HD/3500HD — 6.6L Duramax LLY

Product Details

• Pipe Diameter: 3 inches
• Material: 14-gauge aluminum mandrel-bent construction
• Air Flow Increase: 53% more air than factory intercooler pipe
• Included Components: 2.25-inch to 3-inch silicone boot and t-bolt clamps
• Bridge Compatibility: Designed to work with factory bridge on 2004.5–2005 LLY models
• Installation: No tuning required, bolt-on installation
• Weight: Approximately 12 pounds; ships 24 inches long by 16 inches wide by 10 inches high

Installation

Installs easily with basic hand tools. No additional modifications or upgrades needed to fit on stock trucks. Professional installation is recommended.

Check local emissions regulations before purchase. Professional installation is recommended.

Get the right part the first time.