5.9 Cummins Intake Conversion Plate

For owners of 12-valve and 24-valve 5.9L Cummins engines who want to upgrade to the larger, higher-flowing 6.7L Cummins intake horn, the G&R Diesel Intake Conversion Plate delivers a reliable, precision-engineered solution. This billet component allows you to modernize your intake manifold setup, unlocking improved airflow potential for enhanced performance in modified, high-horsepower, or efficiency-focused builds. Premium Construction & Materials CNC-machined from high-quality billet aluminum, this conversion plate is built for strength, durability, and a perfect fit. It replaces the factory intake plate, providing a robust mounting surface specifically designed to accept 6.7L Cummins intake horns while maintaining structural integrity under boost and vibration. Key Features & Design Advantages 6.7L Intake Horn Compatibility: Enables direct bolting of a 6.7 Cummins intake horn onto your 5.9L engine, significantly increasing intake volume and flow characteristics compared to the stock manifold. Application-Specific Design: Engineered for 1989–2002 Dodge Cummins 5.9L 12V and 24V engines. Precision Machined Fit: Ensures accurate alignment and sealing for reliable operation with upgraded intake systems. Performance-Focused Upgrade: Ideal for custom turbo setups, compound turbo systems, or any build aiming to optimize the intake tract for better throttle response, higher airflow, and increased power potential. Important Installation Considerations This plate is designed specifically to adapt and secure a 6.7L intake horn. It is not a complete intake manifold conversion. Fuel Line Clearance: Depending on your specific intake horn choice, turbo configuration, and other modifications, fuel lines may require rerouting or additional adjustments to avoid interference. Fitment Note: Due to the wide variety of aftermarket intake horns, turbochargers, and related components available in the Cummins performance market, we recommend verifying compatibility with your specific setup. G&R Diesel cannot guarantee fitment across every possible combination. Why Choose the G&R Diesel Intake Conversion Plate? This conversion plate is a smart, cost-effective way to bridge the gap between generations of Cummins engines, giving your 5.9L the benefits of a larger intake horn without a full manifold swap. It reflects G&R Diesel’s commitment to practical, high-quality parts that help enthusiasts achieve their performance goals while maintaining reliability. Applications: 1989–2002 Dodge Ram 5.9L Cummins (12V & 24V) Recommended Pairing: Combine with the G&R Diesel 2" Intake Horn Spacer (GRD59CM1003) for additional clearance and optimized geometry in many builds.