HSP Diesel Cold Air Intake for 2011-2012 Chevrolet and GMC LML Duramax

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