2020-2025 Duramax L5P Deluxe Cold Side Intercooler Pipe - HSP Diesel

***This kit carries a 2-3 week lead time***

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 heat, pressure, and age-related degradation. This often leads to splits or leaks, reducing performance and risking turbocharger damage.

The HSP Solution

HSP Diesel has engineered a premium alternative designed for both long-term durability and high-performance functionality.

Key Features

• 3.5" Mandrel-Bent Aluminized Steel Pipe: Offers smooth, unrestricted airflow for better throttle response, improved reliability, and a cleaner engine sound.
• Billet Coupler Set: Includes a CNC-machined billet aluminum intercooler coupler and a billet throttle body coupler for the strongest, most secure connections available—eliminating weak points common in OEM designs.
• Reinforced Silicone Boots & Stainless Steel T-Bolt Clamps: Leak-free performance under high boost thanks to high-strength boots and T-bolt clamps.
• Custom Powder Coat Options: Multiple finishes are available to suit your truck's aesthetic and complete the under-hood look.

What's Included

• 1x Coldside (HSP-IN-870)
• 1x Welded Throttle Body Coupler (HSP-IN-873)
• 1x 20-24 L5P Throttle Body Coupler (RFB-873-RFAB)
• 1x 3.5" Aluminum 60° Bend (RFB-310-RFAB)
• 1x 20-24 L5P Intercooler Coupler (RFB-872-RFAB)
• 4x 3.5" T-Bolt Clamp (RFB-423-RFAB)
• 1x 3.5" x 4" Straight Boot (RFB-871-RFAB)
• 1x 3.5" x 3.5" 18 Deg Angled Boot (RFB-875-RFAB)