2020-2024 Duramax Cold Side Tube (HSP-D-605-2-HSP)

Fits

The factory cold side intercooler pipe on the 2020-2024 L5P Duramax is a known weak point. Constructed from rubber, the OEM tube is prone to degrading over time due to heat and high boost pressures, which often leads to splits, leaks, and a loss of performance.

The HSP Diesel Cold Side Tube replaces that restrictive rubber setup with a 3.5-inch mandrel-bent aluminized steel pipe. This upgrade eliminates the risk of a burst factory hose while providing smoother airflow and increased durability. A CNC-machined billet aluminum coupler is included to replace the common failure point found in the OEM connection.

Part Number: HSP-D-605-2-HSP-W

• Mandrel-Bent Steel: The 3.5-inch aluminized steel construction offers far superior strength over the stock rubber tubing and improves engine sound.
• Billet Coupler: CNC-machined aluminum coupler ensures a robust, secure connection to the intercooler.
• Reinforced Boots: High-strength silicone boots and stainless T-bolt clamps provide a leak-free seal even under heavy towing and high boost conditions.
• Direct Replacement: Engineered as a direct fit for GM Part Number 84682179.
• Finish: Powder-coated in Polar White for a clean, custom look in the engine bay.

• (1) 3.5" Cold Side Intercooler Tube
• (1) L5P Intercooler Coupler
• (4) Stainless T-Bolt Clamps
• (2) Reinforced Silicone Boots (Straight and Angled)

• Warranty: Supported by the HSP "No BS" Limited Lifetime Warranty.
• Fitment: Specifically designed for L5P Duramax models including High Country, Denali, AT4, and ZR2 trims.