The 031-2-HSP or HSP 2 IN Replacement Drivers Side Up-Pipe for the 2001-2004 Chevrolet and GMC Duramax are an incredible replacement to the factory parts that not only improve performance but also lessen common failure points.

The factory Duramax Uppipes are prone to failure and failure on an up pipe can leave you stranded, down on power, and more. This is why replacing them before a failure is so important and can make or break a moment real fast.

Why Would you need an HSP 2 Inch Replacement Up-pipe?

Before we get into up-pipe issues let's talk about what an up-pipe does, the up-pipe feeds the turbo exhaust gases that then in turn spin the turbo and create boost. The factory up-pipes on the Duramax trucks fail often and more often than not it inchв„ўs when it inchв„ўs least convenient. The major and most common failure point of the factory up-pipe is the bellows. They crack and that causes leaks and then it spirals from there. Other problems that occur are warped flanges from bad gaskets that can not be repaired due to the heat and will just continue to leak.

What does the HSP 2 Inch Replacement Up-Pipe do Differently?

The biggest difference between the factory up-pipe and the HSP 2 inch Replacement is the flow. The HSP 2 Inch Replacement Up-Pipe is a different world when it comes to how much it flows. With better flow we all know comes more power more torque and reduces EGT inchв„ўs all while increasing spool up. Now that covers the performance increase side of things but we have also reliability fixes as well. Our Up-Pipes are made of heavy wall 304 stainless steel tubing. We then took heavy-duty sleeved bellows and put them into our stainless steel tubing to create an up-pipe that is capable of performance and reliability that is far beyond the factory parts.

What comes with the HSP 2IN Replacement Up-Pipes?

• (1) 2 inch Stock Replacement Drivers Up-pipe
• (1)Up-pipe Gasket (Turbo Side)
• (1)Up-Pipe Gasket (Manifold Side)

What Does the HSP 2IN Replacement Up-Pipe Fit?

• LB7: 01-04 VIN Code 1

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.

Overview

• Increased Reliability
• Increased Power
• Lower EGT inchв„ўs
• Increased Spool-up
• Stainless Steel Design
• Gaskets Included
• Heavy-Duty Sleeved Bellow

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 & 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. Below you will be able to clearly read & understand our No BS warranty, its process, and the guidelines in which to follow.