2" Replacement Passenger Side Up-Pipe for 2001-2004 LB7 Duramax

HSP 2" Replacement Passenger Side Up-Pipe for 2001-2004 Chevrolet / GMC Duramax LB7

The 031-1-HSP, or HSP 2" Replacement Passenger Side Up-Pipe, is designed for the 2001-2004 Chevrolet and GMC Duramax LB7. It offers improved performance and addresses common failure points found in factory units.

Why You Need an HSP 2" Replacement Up-Pipe

The factory up-pipes on Duramax trucks are notorious for failing—typically at the bellows—causing power loss, higher EGTs, and potential downtime. As these trucks age, preemptively replacing this component becomes essential for reliability. Warped flanges and gasket issues only worsen with time, heat, and use.

What Makes the HSP 2" Up-Pipe Different?

HSPs 2" up-pipe dramatically increases flow, resulting in better turbo spool-up, lower exhaust gas temperatures (EGTs), more torque, and increased power. Its built from heavy wall 304 stainless steel tubing with heavy-duty sleeved bellows—meaning its both performance-ready and ultra-reliable.

Whats Included

• 1x 2" Stock Replacement Passenger Up-Pipe (HSP-IN-280)
• 1x Turbo Side Up-Pipe Gasket (RFB-821-RFAB)
• 1x Manifold Side Up-Pipe Gasket (RFB-822-RFAB)

Fitment

• LB7: 2001-2004 (VIN Code 1)

VIN Info: The 8th character of your VIN indicates the engine, and the 10th character indicates the model year.

Overview

• Increased reliability and lifespan
• Improved turbo spool and power output
• Lower EGTs
• Heavy-duty sleeved bellows
• 304 stainless steel construction
• Gaskets included for both ends

Our Warranty

HSP NO BS LIMITED LIFETIME WARRANTY

At HSP, we believe in our products and stand firmly behind every item that leaves our facility. For years weve gone above and beyond for our customers—and were not changing that. With our official "No BS" warranty, youll know exactly what to expect and how to get support when needed.

For more information about our Lifetime No BS Warranty, click HERE.