Billet DLC Coated Cummins CR Rocker Arm Trunnion
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Free Ground shipping (Over $200*)
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Top-of-the-line Customer Service
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Upgrade the reliability of your Cummins 24v valvetrain with our Billet DLC Coated Rocker Arm Trunnion—engineered to handle high RPM, increased valve spring pressure, and aggressive tuning without compromise.
Factory trunnions are a known weak point, especially in performance or towing applications. This billet replacement eliminates flex and premature wear while the DLC (Diamond-Like Carbon) coating dramatically reduces friction and heat, ensuring smooth operation and long service life under extreme conditions.
Precision-machined for a direct drop-in fit, this trunnion is the perfect solution for both daily-driven trucks and high-horsepower builds where durability matters most.
CNC-machined from high-strength billet steel
Advanced DLC coating for reduced friction and superior wear resistance
Additional oil grooves for better lubrication
Handles higher RPM and increased valve spring pressures
Improves valvetrain stability and longevity
Direct replacement for factory trunnions
Ideal for stock, towing, and high-performance applications
1998.5-2024 Cummins 5.9L & 6.7L 24v engines
Prevents common factory trunnion failures
Extends Valvetrain life
Built to withstand aggressive tuning, heavy loads, and high rpm.
💪 Built for boost. Trusted for durability.
A must-have upgrade for any serious Cummins build.
Sold Individually
NOTE: 12 required for a full set.
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 #.