HSP Diesel Cold Side Tube for 2020-2024 Chevrolet and GMC L5P Duramax

HSP Standard Cold Side Intercooler Pipe for 2020-2024 Chevrolet / GMC L5P Duramax (D-602-2-HSP)

The Problem with the Factory Cold Side Pipe

The OEM cold side intercooler pipe on the 2020-2024 L5P Duramax is functional, but far from optimal. Constructed from rubber, the stock tube is vulnerable to degradation over time due to heat, pressure, and general wear. This often results in splits or leaks that can significantly reduce performance and potentially lead to turbocharger issues.

The HSP Solution

At HSP Diesel, we've engineered a superior alternative designed to deliver long-term reliability and improved performance.

Key Features

• 3.5" Mandrel-Bent Aluminized Steel Pipe: Replaces the OEM rubber tubing with a rigid steel pipe, ensuring smooth and unrestricted airflow, increased durability, and a refined engine sound.
• Billet Coupler: CNC-machined billet aluminum coupler creates a robust and reliable connection point, eliminating a common failure spot in the OEM setup.
• High-Strength Silicone Boots & Stainless T-Bolt Clamps: Reinforced silicone boots paired with stainless T-bolt clamps provide a secure, leak-free seal even under high boost pressure.
• Custom Powder Coat Options: Available in a wide variety of finishes to complement any engine bay aesthetic.

What's Included

• 1x 3.5" Cold Side Intercooler Tube (HSP-IN-870)
• 1x L5P Intercooler Coupler (RFB-872-RFAB)
• 3x 3.5" T-Bolt Clamp (RFB-423-RFAB)
• 1x 3" T-Bolt Clamp (RFB-422-RFAB)
• 1x 3.5" x 4" Straight Boot (RFB-871-RFAB)
• 1x 3.5" x 3" 18 Deg Angled Boot (RFB-874-RFAB)

Vehicle Fitment

• 2020-2024 Chevrolet Silverado 2500HD / 3500HD (L5P Duramax)
• 2020-2024 GMC Sierra 2500HD / 3500HD (L5P Duramax)

OEM Replacement For

• GM Part #84682179

Our Warranty

HSP NO BS LIMITED LIFETIME WARRANTY

At HSP, we believe in our products and stand firmly behind every single one that leaves our facility. For years, we've gone above and beyond for our customers—even without a formal policy. With the HSP No BS— Limited Lifetime Warranty, that same commitment is now set in stone. We aim to provide clarity, dependability, and support through every step of ownership.

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