HSP Diesel 2003-2004 LB7 Duramax Cold Side Tube - Factory Style - 105-HSP

HSP Cold Side Tube Factory Style for 2003-2004 Chevrolet / GMC Duramax LB7

The 105-HSP, also known as the HSP Cold Side Tube Factory Style for the 2003 and 2004 Chevrolet and GMC LB7 Duramax-equipped trucks, was developed to address the significant airflow limitations in the factory system.

Why You Need the HSP Cold Side Tube Factory Style

The factory charge air system on the LB7 Duramax is extremely restrictive. Power production depends on airflow, and the stock system quickly becomes a bottleneck, especially once tuning, turbo, or fuel upgrades are added. The intercooler systems limitations show up fast, and the HSP Cold Side Tube is designed to fix that problem.

What Makes the HSP Cold Side Tube Factory Style Different?

We increased the diameter of the cold side tube to 3", dramatically improving airflow capacity over stock. Smooth, mandrel-bent curves reduce turbulence and support better air velocity. While power gains will vary depending on other aftermarket components, customers consistently report noticeable improvements in performance and responsiveness. If you're building out your LB7, this upgrade is a must-have.

Whats Included

• 1x Coldside Tube (HSP-IN-214)
• 1x 2.25" T-Bolt Clamp (RFB-420-RFAB)
• 1x 3" T-Bolt Clamp (RFB-422-RFAB)
• 1x 2.25" to 3" Reducer Boot(RFB-441-RFAB)

Fitment

• LB7: 2003-2004 (VIN Code 1)

Note: This part does not fit 2001-2002 LB7 trucks, even though they share the same VIN code.

How to Identify VIN Code: The 8th character of the VIN designates the engine. The 10th character identifies the model year.

Overview

• Increased performance and spool-up
• 3" diameter tubing for improved airflow
• Mandrel-bent for smooth, efficient flow
• Powder coat options to clean up the engine bay
• Upgraded high-strength silicone boots
• Factory-style routing for OEM fitment

Our Warranty

HSP NO BS LIMITED LIFETIME WARRANTY

At HSP, we believe in our products and stand firmly behind every part we produce. For years weve handled nearly every issue our customers have encountered—even without a formal warranty. Now, weve formalized our promise with the No BS Lifetime Warranty. You can expect the same great service, backed with a clear process and coverage you can trust.

For more information about our Lifetime No BS Warranty, click HERE.