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Epic Motorsports Inc

DIESELR- HSP Upper Coolant Tube (2011-2014 Chevrolet / GMC)

DIESELR- HSP Upper Coolant Tube (2011-2014 Chevrolet / GMC)

Regular price $135.00 USD
Regular price Sale price $135.00 USD
Sale Sold out

Due to HSP's current order volumes, we are expecting most Custom HSP products to ship out in 2-4 weeks from the date of purchase and on some products 6-8 weeks. If you would like a more accurate lead time please contact us directly.***

The 537-1-HSP is best known as the HSP Upper Coolant Tube for the 2011-2014 LML Duramax equipped Chevrolet and GMC trucks. This is an often-overlooked piece that can set off that engine bay.

Why would you need the HSP Upper Coolant Tube for the 2011-2014 LML Trucks?

The factory upper coolant tube is a piece that just doesn't work as well as it should and looks awful when compared to the rest of the engine bay in the LML trucks. The factory version of the upper coolant pipe is rubber and is prone to cracking causing failure of the coolant system. This also is apparent when looking at the engine bay that it is center stage and doesn't look like it fits with the rest of the engine bay.

What does the HSP Upper Coolant Tube do differently?

To start the HSP Upper Coolant Tube is made of aluminum. This was done to prevent cracking that can cause cooling system failures. We also made it out of aluminum because we wanted you to be able to clean up the engine bay in that LML Duramax. With powder coat options and the HSP Diesel logo that sits right up top, you can see the difference between the HSP Upper Coolant Tube and the factory piece immediately. We used slight bends to create the perfect drop-in piece that will fit with all factory parts and gives the best flow through that tube possible.

What comes with the HSP Upper Coolant Tube?

  • (1) Aluminum HSP Upper Coolant Tube
  • (1) 1.75 Inch x 3 Inch Straight Boot
  • (1) 1.75 Inch 90 degree Boot
  • (4) 1 3/4 Inch Worm Gear Clamps

Special note

At this time HSP Diesel is making a running change in boot style. This means you will possibly get boots with no logos on them. Please know we are doing this to make sure we can continue to provide you with the high-quality parts you have gotten from HSP Diesel in the past.

What Does the HSP Upper Coolant Tube fit?

  • LML: 11+ 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.


  • Aluminum construction
  • High strength boots
  • No possibility of cracking rubber tube
  • Powder coating options to dress up the engine bay
  • Drop-in replacement

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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