2017-2019 Duramax L5P Cold Air Intake - HSP Diesel

***This kit carries a 2-3 week lead time***

Why Upgrade Your L5P Intake?

The factory intake on the L5P Duramax engine is restrictive and undersized. It limits airflow, reducing performance and response. With the L5P platform offering high power potential from the factory, resolving airflow bottlenecks is essential. The HSP Cold Air Intake solves this problem with improved design and increased efficiency.

What Makes the HSP Cold Air Intake Different?

HSP's intake system is a full metal assembly featuring mandrel-bent tubing for smoother transitions and reduced turbulence. A large heatshield enclosure utilizes the OEM hood scoop for ram-air functionality, helping deliver colder, denser air. This results in improved throttle response, more consistent power, and increased overall performance — all without the need for tuning. Dyno testing has shown increases of up to 20 horsepower on average.

Whats Included:

• 1x 4.5" Cold Air Intake Tube (HSP-IN-151-1)
• 1x L5P Airbox (HSP-IN-736)
• 1x L5P Airbox Lid (HSP-IN-736-1)
• 1x 4.5" Filter (RFB-413-RFAB)
• 4x 1/8" Aluminum Rivet (RFB-098-RFAB)
• 17x Trim Lock (RFB-411-RFAB)
• 4x Heatshield Box Felt Washer (RFB-737-RFAB)
• 2x M4x.7x10mm Bolt (RFB-901-RFAB)
• 1x L5P HSP Backer Plate (RFB-736-3-RFAB)
• 1x M6-1.0 x 10mm Hex Head Bolt (RFB-094-RFAB)
• 1x Black Nylon Push-Type Retainer (RFB-095-RFAB)
• 1x 4" T-Bolt Clamp (RFB-424-RFAB)
• 1x 4.5" T-Bolt Clamp (RFB-435-RFAB)
• 1x L5P Heatshield Box Pins (RFB-736-2-RFAB)
• 1x 4" - 4.5" 58degree Reducer Boot (RFB-772-RFAB)