HSP Diesel Cold Air Intake for 2004.5-2005 Chevrolet and GMC LLY Duramax

HSP Cold Air Intake for 2004.5-2005 Chevrolet / GMC Duramax LLY

The 202-HSP, also known as the HSP Cold Air Intake for the 2004.5-2005 LLY Duramax-equipped Chevrolet and GMC trucks, is one of the first upgrades many owners install. HSP Diesel engineered this intake to outperform the factory system in both form and function.

Why Choose the HSP Cold Air Intake for the LLY Duramax?

The factory intake on the LLY Duramax is restrictive and inadequate for supporting the engines airflow demands. HSP Diesel identified these shortcomings and redesigned the intake system to improve performance while also enhancing the under-hood appearance.

What Makes the HSP Cold Air Intake Different?

This system features 4.5" mandrel-bent tubing, offering a significantly larger and smoother internal diameter than stock. The sweeping bend design minimizes turbulence and maximizes airflow to the turbocharger. It includes a premium air filter and a durable all-metal heatshield box that draws cold air from the headlight bezel and fender port. Dyno results show average gains of 20 horsepower and 58 lb-ft of torque—all while improving aesthetics.

Whats Included

• 1x 4.5" Cold Air Intake Tube (HSP-IN-150-1-151)
• 1x 4.5" Hole Heatshield Box (HSP-IN-748)
• 1x Heatshield Box Lid (HSP-IN-746)
• 1x 4.5" Filter (RFB-413-RFAB)
• 4x 1/8" Aluminum Rivet (RFB-098-RFAB)
• 3x 10-32 x 3/8" Button Head Screws (RFB-099-RFAB)
• 16x Trim Lock(RFB-411-RFAB)
• 1x Heatshield Box Lid Backer Plate (RFB-746-BP-RFAB)
• 2x M4x.7x10mm Bolt (RFB-901-RFAB)
• 1x 3.5" T-Bolt Clamp (RFB-423-RFAB)
• 1x 4.5" T-Bolt Clamp (RFB-435-RFAB)
• 1x 4.5" - 3.5" Reducer Boot (RFB-496-RFAB)

Fitment

• LLY: 2004.5-2005 (VIN Code 2)

How to identify VIN Code: The 8th character of the VIN identifies the engine code. The 10th character denotes the model year.

Overview

• Increased performance and turbo spool-up
• Powder coating for a clean engine bay appearance
• All-metal heatshield box for airtight sealing
• CNC-machined sensor blocks for perfect fit and seal
• High-strength silicone boots for durability

Our Warranty

HSP NO BS LIMITED LIFETIME WARRANTY

At HSP, we believe in our products and stand behind every item that leaves our facility. For years, weve resolved nearly any issue our customers have faced—even without a formal policy. Now, with our “No BS” Lifetime Warranty, weve made that commitment official. Below, youll find all the details on how it works and what it covers.

Click here to read our full Lifetime No BS Warranty