2001-2024 6.6L Duramax LB7-L5P X-Series Piston Ring Kit
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Free Ground shipping (Over $200*)
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Top-of-the-line Customer Service
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Secure payments
Industrial Injection X-Series Piston Ring Kits are built for 2001-2024 6.6L Duramax LB7-L5P engine rebuilds, towing applications, and performance diesel builds. These ring kits are designed to support proper cylinder sealing, oil control, compression, and long-term engine reliability in demanding diesel applications.
This ring kit is designed to pair with Industrial Injection X-Series Pistons and is available in multiple bore sizes to match your engine build.
X-Series Piston Ring Kits are a strong choice for stock rebuilds, heavy towing applications, street performance builds, and high-horsepower diesel engines where sealing, durability, and oil control matter.
Confirm bore size and piston compatibility before ordering. For performance builds or modified engines, consult your engine builder to verify the correct ring kit for your setup.
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 #.