2001-2004 LB7 Duramax Torque Lock Injector Cup Kit
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Free Ground shipping (Over $200*)
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Top-of-the-line Customer Service
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Includes Install Tool & Hardware
Fix one of the most common LB7 Duramax failure points the right way. The Industrial Injection Torque Lock Injector Cup Kit permanently replaces the factory-pressed injector cups with a threaded, screw-in design—eliminating coolant intrusion, injector seal failures, and repeat tear-downs.
Engineered specifically for 2001–2004 GM LB7 Duramax engines, this kit includes everything needed for a professional-grade repair, including the proper install tool and all required hardware.
Converts factory press-in cups to threaded screw-in cups
Prevents coolant leaks into the fuel system
CNC-machined for a precise, leak-free fit
Designed for long-term reliability and repeatable installs
Ideal for stock or performance LB7 builds
2001–2004 GM Duramax LB7
Silverado & Sierra 2500HD / 3500HD
6.6L LB7 Diesel Engines Only
Factory LB7 injector cups are prone to loosening and leaking over time. This screw-in design locks the cups in place, providing a permanent solution trusted by diesel shops and builders nationwide.
Built to solve the problem once—so you don’t have to do the job twice.
Perfect for injector replacements, head work, or preventative maintenance.
Note: Installation is HIGHLY recommended to be performed at a machine shop.
Free economy ground shipping on most orders over $200. This includes lower 48 United States only. Excludes products that must ship freight.
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.
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.
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 RETAIN RA#, INVOICE # AND TRACKING NUMBER UNTIL CREDIT IS RECEIVED BY YOU. We do not research by customer name, only invoice # or RA #.