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HSP Max Air Flow Bundle (2011-2012 Chevrolet / GMC)

HSP Max Air Flow Bundle (2011-2012 Chevrolet / GMC)

Brand: HSP Diesel


Regular price $1,842.89 USD
Regular price $0.00 USD Sale price $1,842.89 USD
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The 583-1-HSP or best known as the Max Air Flow Bundle for the 2011 and 2012 LML Duramax-equipped Chevrolet and GMC trucks. The Max Air flow bundle is a kit that covers almost every base and definitely makes a difference.

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

The Max Air Flow Bundle for the LML Duramax is an incredible value of parts. The kit takes all of the stock parts that we think are huge contributors to a chokepoint of the potential of the LML and replaces them. This kit has the majority of the parts that HSP Diesel makes for the LML and puts them all in one easy-to-buy package and gives you a healthy discount for doing it.

Tell us about the Hot Side Intercooler Pipe that comes in the Max Air Flow Bundle

The HSP Hot Side Intercooler Tube is a work of art. We knew that the stock tube really doesn't cut it and often fails. So we went to work to solve all these problems at once and make it look good. We beefed up the size of the intercooler tube to a 3 Inch diameter to give us the maximum amount of flow possible (up to 40 Percent increase) and increase the amount of air we can put in the tube. We also went to mandrel bends, the reason we did this is that we saw that the stock style created more turbulence and we wanted to make sure that the increased volume of air would move easily through the tube.

Tell us about the Max Flow Bridge and Cold Side Tube that comes in the Max Air Flow Bundle

The HSP Max Flow Bridge is a two-piece design to not Only prevent boost leaks but also make it easier to install. This makes a huge difference in the overall performance of the part. The Max Flow Bridge is also CNC machined to provide the maximum flow possible through the part. We pair the Max flow bridge with the HSP Diesel cold side pipe. This is done to make sure you have the maximum flow coming in and gives you the full package of cold side air in the charge air system.

Tell us about the VGT Intake Mouthpiece that comes in the Max Air Flow Bundle

The VGT Intake Mouthpiece is a stunning design that features handmade bends and a larger diameter. We do this to decrease the air turbulence to create more power and increase the amount of air that the tube can actually flow. HSP Diesel uses an O-ring style seal to make sure that the air coming into the mouthpiece is the air we want and make sure air does not escape. The HSP Diesel Intake Mouthpiece gives you the ability to reroute your factory PCV system and remove the factory resonator box, eliminating unwanted engine oil gumming up the turbo and intake system (PCV re-route sold separately see 003-1-HSP).

Tell us about the Cold Air Intake that comes in the HSP Max Air Flow Bundle

The Cold Air Intake that is inside the Max Air Flow Bundle is the piece that ties everything together. With an average of 20 horsepower increase using our 4 1/2 Inch mandrel-bent intake tube and the HSP Diesel heatshield, we have created an intake worthy of the Max Air Flow Bundle. Adding air and keeping the temperatures down makes all the difference when it comes to making power we have found that on average every 1-degree increase in intake air temps results in an average of 3hp loss.

Tell us about the passenger side up-pipe that comes in the Max Air Flow Bundle

The biggest change that the HSP Diesel Up-Pipe makes is the flow. We increased the flow due to our design as much as possible and then made it with a heavy wall 304 stainless steel tubing. This gave us strength and long-term reliability. HSP Diesel also used a heavy-duty sleeved style bellow.

What comes with the HSP Max Air Flow Bundle

  • (1) Hot Side Intercooler Tube
  • (1) Cold Side Intercooler Tube
  • (1) Max Flow Bridge
  • (1) Cold Air Intake
  • (1) VGT Intake Mouthpiece
  • (1) Passenger Side Up-Pipe
  • (3) 3 Inch x4 Inch Straight boot
  • (7) 3 Inch t-bolt clamps
  • (1) 2.25 Inch - 3 Inch Reducer boot
  • (1) 2.25 Inch t-bolt clamp
  • (1) Duramax pre-made hose
  • (1) M6x1.016mm flange bolt
  • (4) M6x1.0x20mm flange bolt
  • (2) M6x1.0x25mm flange bolt
  • (1) 1/2 Inch worm gear clamp
  • (1) 5/8 Inch worm gear clamp
  • (2) 1/8 Inch NPT brass plug
  • (1) rear cover coolant plug
  • (1) coolant plug o-ring
  • (1) 3/4 Inch to 5/8 Inch heater hose connector
  • (1) 3/8 Inch coolant plug
  • (2) M4x7x10mm bolt
  • (3) 10-32 x 3/8 Inch Button head screws
  • (4) 1/8 Inch aluminum rivet
  • (1) 4 Inch - 4.5 Inch reducer boot
  • (1) 4 Inch T-bolt clamp
  • (1) 4.5 Inch T-bolt clamp
  • (1) 4.5 Inch Filter
  • (1) up-pipe gasket (turbo side)
  • (1) up-pipe gasket (manifold side)

What Does The HSP Max Air Flow Bundle Fit?

  • LML: 11-12 VIN Code 8

How do people know the VIN code?

Engine code is dictated by the 8th character of the VIN number. The 10th character is the year of the truck.

Special note

  • This Only fits the 2011-2012 LML engines even though the Vin code is the same. This is due to small changes that were made in the engine bay. Please be sure you are ordering for the correct year truck.


  • Increased performance
  • High flowing cold air intake
  • Increased sized hot and cold side tubes
  • Heavy-duty up-pipe
  • Powder Coat options for a clean look under the hood
  • Hand made parts
  • CNC machined Max Flow Bridge

Our Warranty

HSP No BS Limited Lifetime Warranty

At HSP we believe in our products and we stand firmly behind every single one that leaves our facility. For years we have taken care of almost everything and anything that our customers had issues with, but we didn't have a set in stone warranty. We have always gone above and beyond for our customers which set us apart from the rest. We will continue that same standard, but now we are taking things to the next level.

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