HSP Diesel 2in Replacement Driver Side Up-Pipe for 2001-2004 Chevrolet And GMC LB7 Duramax
This product is vehicle-specific. Select your year, make, model, engine and transmission to confirm compatibility before adding it to your cart.
Colours and prices as published by HSP Diesel · verified 9/8/2026
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- Ships from HSP Diesel
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
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
HSP offers a limited lifetime warranty to the original purchaser on eligible HSP products. Underhood powder coating has separate two-year limited coverage. Non-HSP brands follow their own manufacturer warranties. Discontinued products and customer/installer damage are excluded. Claim authorization is required; customer pays inbound shipping for ordinary claims.
Return and warranty information is based on what HSP Diesel offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
HSP Diesel warranty policyView complete warrantyProduct conditions
Return and warranty information is based on what HSP Diesel offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
- Return eligibility
- HSP states returns must be postmarked within 30 days of purchase, new and unused with original tags and packaging, with an approved RMA. A 15% restocking fee and customer-paid return shipping apply. Special orders, non-HSP dropship products, apparel, used items and custom colors are excluded. Based on what HSP Diesel offers.
- Return window
- Not stated for this product; see supplier terms
- Restocking fee
- See supplier terms; no product-specific fee stated
- Return shipping
- Based on the supplier’s return policy; see terms
- Made to order
- No
- Backorder status
- Not backordered
- Cancellation
- Subject to supplier terms; contact FullSpecDiesel before requesting cancellation
- Warranty provider
- HSP Diesel
- Warranty duration
- Product-specific duration not stated; see supplier terms
- Compatibility
- Listed for specific vehicle configurations
- Legal use
- Street legal
- Processing estimate
- 3–10 business days supplier processing
- Shipping
- Shipping calculated at checkout
- Signature
- No signature requirement
- Supplier
- HSP Diesel
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.