HSP Diesel Cold Air Intake for 2011-2012 Chevrolet and GMC LML 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 2011-2012 Chevrolet / GMC Duramax LML Part Number: 502-1-HSP The 502-1-HSP, best known as the HSP Cold Air Intake for the 2011-2012 LML Duramax-equipped Chevrolet and GMC trucks, is a game-changer. A cold air intake is often one of the first upgrades diesel owners make — and HSPs solution is designed for maximum gains and engine bay appeal. Why Choose the HSP Cold Air Intake? Factory intakes on turbocharged diesel trucks are known to be restrictive and inefficient. Filters wear out faster than expected and performance suffers. HSP Diesel saw the opportunity to improve on the LML platform, making it an ideal candidate for an upgraded Cold Air Intake system. What Makes the HSP Cold Air Intake Different? The HSP Cold Air Intake delivers an average of 20 additional horsepower and 58 lb-ft of torque. This is achieved through a 4.5" mandrel-bent aluminum intake tube, which ensures consistent, unrestricted airflow. The included heatshield box blocks hot engine air, allowing only cooler, denser air into the system — which translates into more power and efficiency. CNC-machined sensor blocks guarantee a perfect seal and clean installation. *Special
Note:
Compatible only with trucks running the factory VGT turbo, model years 2011-2012. Whats Included 1x 4.5" Cold Air Intake Tube (HSP-IN-150-12) 1x 4.5" Hole Heatshield Box (HSP-IN-749) 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 4" T-Bolt Clamp (RFB-424-RFAB) 1x 4.5" T-Bolt Clamp (RFB-435-RFAB) 1x 4.5" - 4" Straight Boot (RFB-495-RFAB) Fitment LML: 2011-2012 (VIN Code 8)
Note:
The 8th character of the VIN indicates engine code; the 10th character indicates the model year. Overview Increased performance and spool-up Heat deflection box with airtight seal 4.5" mandrel-bent aluminum tubing CNC-machined sensor blocks Powder coat options to enhance engine bay appearance Streamlined, cleaner look Our Warranty HSP NO BS LIMITED LIFETIME WARRANTY At HSP, we believe in our products and stand firmly behind every one that leaves our facility. For years, weve resolved nearly every issue our customers encountered — often going above and beyond. Now, with our official No BS Warranty, you can count on us even more. Read the full details and process below. Click here to read the full HSP Warranty
HSP Cold Air Intake for 2011-2012 Chevrolet / GMC Duramax LML Part Number: 502-1-HSP The 502-1-HSP, best known as the HSP Cold Air Intake for the 2011-2012 LML Duramax-equipped Chevrolet and GMC trucks, is a game-changer. A cold air intake is often one of the first upgrades diesel owners make — and HSPs solution is designed for maximum gains and engine bay appeal. Why Choose the HSP Cold Air Intake? Factory intakes on turbocharged diesel trucks are known to be restrictive and inefficient. Filters wear out faster than expected and performance suffers. HSP Diesel saw the opportunity to improve on the LML platform, making it an ideal candidate for an upgraded Cold Air Intake system. What Makes the HSP Cold Air Intake Different? The HSP Cold Air Intake delivers an average of 20 additional horsepower and 58 lb-ft of torque. This is achieved through a 4.5" mandrel-bent aluminum intake tube, which ensures consistent, unrestricted airflow. The included heatshield box blocks hot engine air, allowing only cooler, denser air into the system — which translates into more power and efficiency. CNC-machined sensor blocks guarantee a perfect seal and clean installation. *Special
Note:
Compatible only with trucks running the factory VGT turbo, model years 2011-2012. Whats Included 1x 4.5" Cold Air Intake Tube (HSP-IN-150-12) 1x 4.5" Hole Heatshield Box (HSP-IN-749) 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 4" T-Bolt Clamp (RFB-424-RFAB) 1x 4.5" T-Bolt Clamp (RFB-435-RFAB) 1x 4.5" - 4" Straight Boot (RFB-495-RFAB) Fitment LML: 2011-2012 (VIN Code 8)
Note:
The 8th character of the VIN indicates engine code; the 10th character indicates the model year. Overview Increased performance and spool-up Heat deflection box with airtight seal 4.5" mandrel-bent aluminum tubing CNC-machined sensor blocks Powder coat options to enhance engine bay appearance Streamlined, cleaner look Our Warranty HSP NO BS LIMITED LIFETIME WARRANTY At HSP, we believe in our products and stand firmly behind every one that leaves our facility. For years, weve resolved nearly every issue our customers encountered — often going above and beyond. Now, with our official No BS Warranty, you can count on us even more. Read the full details and process below. Click here to read the full HSP 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.