LB7 Duramax 6.6L Stock Remanufactured Heads With Torque Lock Injector Cups (2001-2004)
SKU: PDM-LB7SH-TL
Product Description:
2001–2004 LB7 Duramax 6.6L Stock Remanufactured Cylinder Heads with Torque Lock Injector Cups
Restore factory performance and long-term reliability to your 2001–2004 LB7 Duramax 6.6L with these stock remanufactured cylinder heads, professionally upgraded with Torque Lock injector cups to permanently address one of the LB7’s most common failure points—injector cup movement and coolant intrusion.
Designed as a direct bolt-on replacement, these remanufactured Duramax heads are rebuilt to OE specifications, thoroughly inspected, pressure tested, and precision machined to deliver dependable performance for stock rebuilds or mild performance applications. Whether you’re replacing failed heads or performing a preventative upgrade, these heads provide a proven solution for long-term durability.
Key Features
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Stock remanufactured LB7 Duramax cylinder heads
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Upgraded with Torque Lock injector cups for superior sealing and retention
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Eliminates common LB7 injector cup failure and coolant intrusion issues
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Fully cleaned, pressure tested, and resurfaced
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Diamond honed valve guides
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Unshrouded valves for improved airflow
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High-strength, heat-treated iron-based valve guides
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Premium nickel-based, non-magnetic valve seat inserts
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Multi-angle valve job
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New valve springs installed
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Assembled and ready for installation
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Ideal for stock replacement or mild performance builds
Torque Lock Injector Cup Upgrade
Unlike factory press-in injector cups or aftermarket cupless head castings, Torque Lock injector cups are mechanically locked in place to prevent movement under high heat and pressure. This design significantly reduces the risk of injector leaks, combustion gas intrusion, and coolant contamination—making these heads a superior upgrade over standard remanufactured LB7 heads.
What’s Included
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Left and right remanufactured LB7 cylinder heads
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Pre-installed Torque Lock injector cups
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Fully assembled and ready to install
Not Included:
Gaskets, head bolts, injectors, or installation hardware
Vehicle Fitment
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2001–2004 GM Duramax LB7 6.6L
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Chevrolet Silverado 2500HD / 3500HD
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GMC Sierra 2500HD / 3500HD
Why Choose These LB7 Reman Heads?
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OE-style performance with modern reliability upgrades
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Proven solution for LB7 injector cup failures
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Ideal for cylinder head replacement or preventative upgrades
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Professionally remanufactured and quality-checked
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Built for long-term durability and peace of mind
Core Return Information
Sold as a matched left and right pair.
To receive full core credit, a good, reusable pair of LB7 cylinder heads must be returned. Cores must be free of cracks, excessive warping, or severe damage. Core returns are required within 90 days of purchase.
Free economy ground shipping on most orders over $200. This includes lower 48 United States only. Excludes products that must ship freight.
Read Carefully!
When you purchase a product from our website that has a core requirement, you have two options:
1. You choose to pay the core charge and we will ship the product right away, then once we receive the cores you will be refunded the core charge if your cores pass our inspection qualifications. This is the preferred choice and has the least delays.
2. You choose to send in your cores before we ship the product that was purchased. This choice has the risk of delayed shipment of your purchased product and our inventory is not guaranteed by the time we receive your cores. You will need to follow all of the instructions below as quickly as possible so that you can get your purchased product and we can receive the cores. When you choose this option you acknowledge that by the time we receive your cores, our inventory could have change and there could be a delay in your shipment.
Please return all cores to:
Industrial Injection Core Returns
2858 South 300 West
Salt Lake City, Utah 84115
INCLUDE RA# THAT WAS ISSUED AT TIME OF PURCHASE! If RA # is lost, please call Customer Service at (800) 955-0476. Have your original invoice at time of phone call to give all appropriate information for return.
Core return freight is the responsibility of the customer
FULL CREDIT WILL BE GIVEN WHEN:
In order to receive full core credit, your core(s) must be returned within 90 days from receipt of order. It must be as is “off the engine.” Full core credit will be given if core meets acceptance criteria. Cores that are damaged during shipment to Industrial Injection are the responsibility of the customer and their shipping company.
½ CORE CHARGE CREDIT WILL BE GIVEN WHEN:
- Slightly damaged housing or camshaft
- Missing parts such as FCA
No Core Credit issued when:
- Core is seized or hydraulic head is cracked
- Excessive damage ( Heavy use of Bio-diesel and rust are common causes for unacceptable core)
- Core is fire damaged
- Core is returned after 90 days/3months
Please do the following when returning a core:
- Make sure you have removed all fittings from your old unit
- Drain all fuel and oil from unit
- Package cores so that fuel and oil does not escape from the package
NOTE: packages that have fuel or oil residue on the outside of the box during shipping will not be delivered by UPS or the postal service which will cause delays.
- Please re-use boxes and bags that parts were shipped in originally. These boxes are UPS approved to reduce damage while being handled in freight.
- All shipping charges are the responsibility of the customer
- Please write on the box “Core Return” and have RA # clearly written on the outside of box
- Include copy of original invoice and RGA inside box
PLEASE RETAIN RA#, INVOICE # AND TRACKING NUMBER UNTIL CREDIT IS RECEIVED BY YOU. We do not research by customer name, only invoice # or RA #.
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