HSP Diesel 2011-2012 LML Duramax Max Air Flow Bundle - 583-1-HSP

HSP 2011-2012 Chevrolet / GMC Max Air Flow Bundle

Part Number: 583-1-HSP

The 583-1-HSP, known as the Max Air Flow Bundle, is designed for the 2011-2012 LML Duramax-equipped Chevrolet and GMC trucks. This kit covers nearly every performance-choking point in the stock system and delivers real, dyno-proven improvements.

What Is the Max Air Flow Bundle for the LML Duramax?

This bundle targets restrictive factory components and replaces them with high-flow, durable HSP Diesel parts. Designed as a value-packed upgrade, it includes many of our most effective performance pieces in one discounted kit.

Hot Side Intercooler Pipe

Upgraded to 3" mandrel-bent aluminum for up to 40% more airflow. Eliminates common failure points in the stock setup while improving reliability and airflow consistency.

Max Flow Bridge and Cold Side Tube

Our two-piece CNC-machined Max Flow Bridge features an O-ring seal for leak-free boost. It's paired with a 3" cold side mandrel-bent pipe to provide consistent, unrestricted flow through the charge air system.

VGT Intake Mouthpiece

Hand-fabricated with larger diameter bends and an O-ring seal, this mouthpiece reduces turbulence, improves boost response, and ensures unfiltered air doesnt enter the turbo.

Cold Air Intake

Includes a 4.5" mandrel-bent tube and open-style heat shield box for cooler, denser air. On average, this system contributes up to 20 horsepower and helps avoid power losses from heat soak.

Passenger Side Up-Pipe

Built from heavy-wall 304 stainless steel with sleeved bellows. Designed for high-flow and maximum durability, this up-pipe helps reduce EGTs and improve turbo spool-up.

Whats Included:

• 1x Hotside Tube (HSP-IN-218)
• 1x Bridge (HSP-IN-223)
• 1x Coldside (HSP-IN-228)
• 1x Fabricated Turbo Inlet (HSP-IN-216-2)
• 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 2" Stock Replacement Up Pipe - Passenger - Ceramic Coated (HSP-IN-280-C)
• 1x 4.5" Filter (RFB-413-RFAB)
• 1x 1/8'' NPT Brass Plug (RFB-811-RFAB)
• 1x M6x1.0x16mm Flange Bolt (RFB-893-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)
• 1x 2.25" T-Bolt Clamp (RFB-420-RFAB)
• 3x 3" T-Bolt Clamp (RFB-422-RFAB)
• 1x 3"x4" Straight Boot (RFB-430-RFAB)
• 1x 2.25" to 3" Reducer Boot (RFB-441-RFAB)
• 1x Up-pipe Gasket (Turbo Side) (RFB-821-RFAB)
• 1x Up-Pipe Gasket (Manifold Side) (RFB-822-RFAB)
• 1x Duramax Pre-Made Hose - Rubber (RFB-398-RFAB)
• 1x 5/8" Worm Gear Clamp (RFB-403-RFAB)
• 1x 1/2" Worm Gear Clamp (RFB-405-RFAB)
• 60x 5/8" PCV Hose (RFB-407-RFAB)
• 4x 3" T-Bolt Clamp (RFB-422-RFAB)
• 2x 3"x4" Straight Boot (RFB-430-RFAB)
• 1x 3/4" to 5/8" Heater Hose Connector (RFB-462-RFAB)
• 1x 3/8" Coolant Plug - Aluminum (RFB-808-RFAB)
• 1x Rear Cover Coolant Fitting (RFB-809-RFAB)
• 1x Coolant Plug O-Ring (RFB-813-RFAB)
• 2x M6x1.0x25mm Flange Bolt (RFB-896-RFAB)
• 4x M6x1.0x20mm Flange Bolt (RFB-897-RFAB)

Vehicle Fitment:

• LML: 2011-2012 (8th digit of VIN = 8)

How to Verify: The 8th character of the VIN indicates engine code. The 10th character shows the model year.

Special Note:

• This kit is specific to 2011-2012 models. Despite sharing a VIN code with newer years, changes in the engine bay prevent cross-compatibility.

Overview:

• Increased performance and airflow
• High-flow Cold Air Intake system
• 3" Mandrel-Bent Hot and Cold Side Tubes
• Heavy-duty stainless steel up-pipe
• Precision CNC-machined Max Flow Bridge
• Handmade, O-ring-sealed components
• Powder coat finish options available

Our Warranty

HSP “No BS” Limited Lifetime Warranty
We stand firmly behind every product that leaves our facility. For full warranty details and claim process, click here.