HSP Diesel Cold Air Intake for 2004.5-2005 Chevrolet and GMC LLY Duramax
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Colours and prices as published by HSP Diesel · verified 9/8/2026
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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
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
HSP offers a limited lifetime warranty to the original purchaser on eligible HSP products. Underhood powder coating has separate two-year limited coverage. Non-HSP brands follow their own manufacturer warranties. Discontinued products and customer/installer damage are excluded. Claim authorization is required; customer pays inbound shipping for ordinary claims.
Return and warranty information is based on what HSP Diesel offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
HSP Diesel warranty policyView complete warrantyProduct conditions
Return and warranty information is based on what HSP Diesel offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
- Return eligibility
- HSP states returns must be postmarked within 30 days of purchase, new and unused with original tags and packaging, with an approved RMA. A 15% restocking fee and customer-paid return shipping apply. Special orders, non-HSP dropship products, apparel, used items and custom colors are excluded. Based on what HSP Diesel offers.
- Return window
- Not stated for this product; see supplier terms
- Restocking fee
- See supplier terms; no product-specific fee stated
- Return shipping
- Based on the supplier’s return policy; see terms
- Made to order
- No
- Backorder status
- Not backordered
- Cancellation
- Subject to supplier terms; contact FullSpecDiesel before requesting cancellation
- Warranty provider
- HSP Diesel
- Warranty duration
- Product-specific duration not stated; see supplier terms
- Compatibility
- Listed for specific vehicle configurations
- Legal use
- Street legal
- Processing estimate
- 3–10 business days supplier processing
- Shipping
- Shipping calculated at checkout
- Signature
- No signature requirement
- Supplier
- HSP Diesel
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.