HSP Diesel Billet Valve Covers for 2001-2004 Chevrolet and GMC LB7 Duramax
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Colours and prices as published by HSP Diesel · verified 9/8/2026
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HSP Billet Valve Covers for 2001-2004 Chevrolet / GMC Duramax LB7 The 146-HSP, also known as the HSP Billet Valve Covers for the 2001-2004 LB7 Duramax-equipped Chevrolet and GMC trucks, are a stunning upgrade for those looking to add serious style and performance under the hood. These valve covers are a showpiece—built for those who want to stand out at the track or a show. Why Choose the HSP Billet Valve Covers? While not a required upgrade, the HSP Billet Valve Covers represent the next level of refinement. The factory upper valve covers are basic and dont do justice to a built or visually enhanced LB7 engine. With HSP Diesels lineup of performance and aesthetic parts, it only makes sense to complete the engine bay with covers that match that level of craftsmanship. These billet covers make your setup truly stand out. What Makes the HSP Billet Valve Covers Different? These are the worlds first full billet upper valve covers for the LB7, CNC machined from 6061 T6 aluminum for a perfect fit and unmatched finish. Designed with both looks and function in mind, the covers accommodate the factory FICM location and include a fuel line support bracket. They're also compatible with the HSP Diesel ventilation kit. Powder coating options give you the ability to match or accent your build for that next-level engine bay presence. Whats Included 1x LB7 Billet Valve Cover Passenger Side (HSP-IN-1005) 1x LB7 Billet Valve Cover Driver Side (HSP-IN-1006) 4x M4-0.7 x 6mm Socket Cap Screw (RFB-093-RFAB) 2x Small HSP Logo (Flat) (RFB-752-F-RFAB) 22x M6x1.0x16mm Socket Cap Bolts (RFB-206-RFAB) 6x M8-1.25 Zinc Finish Steel Jam Nut (RFB-852-RFAB) 3x M8x40 Double End Black Stud (RFB-973-RFAB) 2x M8x50 Double End Black Stud (RFB-974-RFAB) 1x M8x60 Double End Black Stud (RFB-975-RFAB) 2x Aluminum Spacer (5/8 OD, .382 ID, 1-1/16 Long) (RFB-976-RFAB) 2x Aluminum Spacer (5/8 OD, .382 ID, 1-1/2 Long) (RFB-977-RFAB) 2x Aluminum Spacer (5/8 OD, .382 ID, 3/4 Long) (RFB-978-RFAB) 1x Aluminum Spacer (5/8 OD, .382 ID, 11/16 Long) (RFB-979-RFAB) Fitment LB7: 2001-2004 (VIN Code 1) How to identify VIN Code: The 8th character of the VIN identifies the engine code. The 10th character denotes the model year. Special Notes Recommended for use with HSP Diesels forward-facing thermostat housing, as there are no provisions to mount factory hardware to the valve covers. These covers no longer include O-rings. Grey RTV is recommended for proper sealing. Overview Billet 6061 T6 Aluminum Construction Precision CNC Machined Striking Powder Coat Options Complete New Hardware Included Better Fit Than Factory Covers Our Warranty HSP NO BS LIMITED LIFETIME WARRANTY At HSP, we believe in our products and stand firmly behind every one that leaves our facility. For years, weve supported customers through nearly every issue—going above and beyond, even without a formal policy. Weve now taken that commitment to the next level with our “No BS” Lifetime Warranty. Below, you can read and understand the process and terms. Click here to view our full Lifetime No BS Warranty
HSP Billet Valve Covers for 2001-2004 Chevrolet / GMC Duramax LB7 The 146-HSP, also known as the HSP Billet Valve Covers for the 2001-2004 LB7 Duramax-equipped Chevrolet and GMC trucks, are a stunning upgrade for those looking to add serious style and performance under the hood. These valve covers are a showpiece—built for those who want to stand out at the track or a show. Why Choose the HSP Billet Valve Covers? While not a required upgrade, the HSP Billet Valve Covers represent the next level of refinement. The factory upper valve covers are basic and dont do justice to a built or visually enhanced LB7 engine. With HSP Diesels lineup of performance and aesthetic parts, it only makes sense to complete the engine bay with covers that match that level of craftsmanship. These billet covers make your setup truly stand out. What Makes the HSP Billet Valve Covers Different? These are the worlds first full billet upper valve covers for the LB7, CNC machined from 6061 T6 aluminum for a perfect fit and unmatched finish. Designed with both looks and function in mind, the covers accommodate the factory FICM location and include a fuel line support bracket. They're also compatible with the HSP Diesel ventilation kit. Powder coating options give you the ability to match or accent your build for that next-level engine bay presence. Whats Included 1x LB7 Billet Valve Cover Passenger Side (HSP-IN-1005) 1x LB7 Billet Valve Cover Driver Side (HSP-IN-1006) 4x M4-0.7 x 6mm Socket Cap Screw (RFB-093-RFAB) 2x Small HSP Logo (Flat) (RFB-752-F-RFAB) 22x M6x1.0x16mm Socket Cap Bolts (RFB-206-RFAB) 6x M8-1.25 Zinc Finish Steel Jam Nut (RFB-852-RFAB) 3x M8x40 Double End Black Stud (RFB-973-RFAB) 2x M8x50 Double End Black Stud (RFB-974-RFAB) 1x M8x60 Double End Black Stud (RFB-975-RFAB) 2x Aluminum Spacer (5/8 OD, .382 ID, 1-1/16 Long) (RFB-976-RFAB) 2x Aluminum Spacer (5/8 OD, .382 ID, 1-1/2 Long) (RFB-977-RFAB) 2x Aluminum Spacer (5/8 OD, .382 ID, 3/4 Long) (RFB-978-RFAB) 1x Aluminum Spacer (5/8 OD, .382 ID, 11/16 Long) (RFB-979-RFAB) Fitment LB7: 2001-2004 (VIN Code 1) How to identify VIN Code: The 8th character of the VIN identifies the engine code. The 10th character denotes the model year. Special Notes Recommended for use with HSP Diesels forward-facing thermostat housing, as there are no provisions to mount factory hardware to the valve covers. These covers no longer include O-rings. Grey RTV is recommended for proper sealing. Overview Billet 6061 T6 Aluminum Construction Precision CNC Machined Striking Powder Coat Options Complete New Hardware Included Better Fit Than Factory Covers Our Warranty HSP NO BS LIMITED LIFETIME WARRANTY At HSP, we believe in our products and stand firmly behind every one that leaves our facility. For years, weve supported customers through nearly every issue—going above and beyond, even without a formal policy. Weve now taken that commitment to the next level with our “No BS” Lifetime Warranty. Below, you can read and understand the process and terms. Click here to view our full Lifetime No BS 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.
Professional installation is recommended.
- 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.