HSP Diesel 2in Replacement Driver Side Up-Pipe for 2001-2004 Chevrolet And GMC LB7 Duramax

HSP 2001-2004 Chevrolet / GMC 2" Replacement Driver Side Up-Pipe

Part Number: 031-2-HSP

The HSP 2" Replacement Driver Side Up-Pipe is a direct upgrade for the 2001-2004 LB7 Duramax-equipped Chevrolet and GMC trucks. Designed to improve flow and durability, it addresses the common failure points of the factory up-pipe while offering measurable performance benefits.

Why Replace Your Factory Up-Pipe?

The up-pipe plays a vital role by feeding exhaust gases to the turbo, generating boost. Factory up-pipes are known to fail—often at the worst times—due to weak bellows and heat-warped flanges. These failures cause power loss, increased exhaust temps, and driveability issues. Replacing them proactively prevents breakdowns and performance dips.

What Makes the HSP 2" Up-Pipe Better?

HSPs 2" Up-Pipe outperforms OEM versions with increased flow capacity, leading to better spool-up, reduced EGTs, and more power and torque. Its crafted from heavy-wall 304 stainless steel and features heavy-duty sleeved bellows for exceptional reliability under heat and stress. This is the perfect blend of strength and performance in one critical upgrade.

Whats Included:

• (1) 2" Stock Replacement Driver Side Up-Pipe
• (1) Up-Pipe Gasket (Turbo Side) (RFB-821-RFAB)
• (1) Up-Pipe Gasket (Manifold Side) (RFB-822-RFAB)

Fitment:

• LB7: 2001-2004 (VIN Code 1)

How to verify the VIN code: The engine code is the 8th character of your VIN, and the 10th character indicates the model year.

Overview:

• Increased reliability and lifespan
• Improved exhaust flow and performance
• Lower exhaust gas temperatures (EGTs)
• Faster turbo spool-up
• 304 stainless steel construction
• Includes high-quality gaskets
• Heavy-duty sleeved bellow for durability

Our Warranty

HSP "NO BS" Limited Lifetime Warranty
At HSP, we believe in our products and stand firmly behind everything we make. For years, weve supported our customers beyond expectations. Now, our "No BS" warranty makes that commitment official—clear, strong, and built around you.

Click here to view the HSP Warranty