HSP Diesel 2in Replacement Passenger and 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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HSP 2 Inch Replacement Up-Pipes for 2001-2004 Chevrolet / GMC Duramax The 031-HSP or HSP 2 Inch Replacement Up-Pipes are high-performance replacements for the factory up-pipes on 2001-2004 Duramax trucks. They offer improved reliability, performance, and durability—addressing some of the most common OEM failure points. Why Would You Need HSP 2 Inch Replacement Up-Pipes? The up-pipes are essential—they feed exhaust gases to your turbo, generating boost. The factory units are prone to failure, especially at the bellows. These failures can lead to power loss, excessive heat, and inconvenient breakdowns. Replacing them before failure is key to protecting your trucks performance. What Makes HSP Up-Pipes Different? HSPs 2-inch up-pipes significantly improve exhaust flow, which translates to more power, lower EGTs, faster spool-up, and greater torque. Built from heavy-wall 304 stainless steel with reinforced sleeved bellows, these up-pipes are engineered to withstand high heat and pressure far better than OEM units. Whats Included in the HSP 2 Inch Up-Pipe Kit? 1x 2" Stock Replacement Passenger Up-Pipe 1x 2" Stock Replacement Driver Up-Pipe 2x Up-Pipe Gasket (Turbo Side) 2x Up-Pipe Gasket (Manifold Side) Fitment LB7 Duramax: 2001-2004 (VIN Code 1)
Note:
The 8th character of your VIN identifies the engine code. The 10th character indicates the year of your truck. Overview Increased reliability Improved exhaust flow Lower EGTs Faster turbo spool-up Heavy-duty sleeved bellows 304 stainless steel construction Includes turbo and manifold gaskets Our Warranty HSP NO BS LIMITED LIFETIME WARRANTY At HSP, we believe in our products and stand behind everything that leaves our facility. For years, weve taken care of nearly any issue our customers have had—even without a formal policy. Now, weve codified that commitment in our No BS Lifetime Warranty. For more information about our Lifetime No BS Warranty, click HERE.
HSP 2 Inch Replacement Up-Pipes for 2001-2004 Chevrolet / GMC Duramax The 031-HSP or HSP 2 Inch Replacement Up-Pipes are high-performance replacements for the factory up-pipes on 2001-2004 Duramax trucks. They offer improved reliability, performance, and durability—addressing some of the most common OEM failure points. Why Would You Need HSP 2 Inch Replacement Up-Pipes? The up-pipes are essential—they feed exhaust gases to your turbo, generating boost. The factory units are prone to failure, especially at the bellows. These failures can lead to power loss, excessive heat, and inconvenient breakdowns. Replacing them before failure is key to protecting your trucks performance. What Makes HSP Up-Pipes Different? HSPs 2-inch up-pipes significantly improve exhaust flow, which translates to more power, lower EGTs, faster spool-up, and greater torque. Built from heavy-wall 304 stainless steel with reinforced sleeved bellows, these up-pipes are engineered to withstand high heat and pressure far better than OEM units. Whats Included in the HSP 2 Inch Up-Pipe Kit? 1x 2" Stock Replacement Passenger Up-Pipe 1x 2" Stock Replacement Driver Up-Pipe 2x Up-Pipe Gasket (Turbo Side) 2x Up-Pipe Gasket (Manifold Side) Fitment LB7 Duramax: 2001-2004 (VIN Code 1)
Note:
The 8th character of your VIN identifies the engine code. The 10th character indicates the year of your truck. Overview Increased reliability Improved exhaust flow Lower EGTs Faster turbo spool-up Heavy-duty sleeved bellows 304 stainless steel construction Includes turbo and manifold gaskets Our Warranty HSP NO BS LIMITED LIFETIME WARRANTY At HSP, we believe in our products and stand behind everything that leaves our facility. For years, weve taken care of nearly any issue our customers have had—even without a formal policy. Now, weve codified that commitment in our No BS Lifetime Warranty. For more information about our Lifetime No BS Warranty, click HERE.
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.