The real limit on the 2020-23 Duramax intake system is not just tubing size. It is the ECM watching air mass so closely through the mass air flow sensor that even small changes can set a check engine light. That is why most aftermarket systems end up matching stock airflow past the sensor. We changed that with the Banks Ram-Air Intake System and our patented Air Mass Control Module. That control strategy lets us engineer beyond the stock electronic constraint, so we can run a much larger SuperTube instead of being boxed into stock-style sizing. The result is 58% more air mass than stock with no check engine light, along with improved power, sharper throttle response, and increased fuel economy. For this application, the breakthrough is not just a bigger intake. It is making a bigger intake work with the truck’s engine management.
The truck's mass air flow, or MAF, sensor measures the mass of incoming air as it passes through the intake tube and reports that information to the engine control module. Because the system closely monitors airflow, deviations from expected readings can trigger a check engine light.
According to Banks, this sensitivity forces many aftermarket intake manufacturers to keep their designs close to the factory configuration.
By maintaining a stock-sized intake tube and similar airflow characteristics, manufacturers can avoid disrupting MAF sensor readings enough to trigger diagnostic trouble codes. The tradeoff is that airflow improvements may be limited.
Banks addresses this limitation with its Air Mass Control Module.
The module allows Banks to change the intake geometry while maintaining the airflow information expected by the truck's engine management system. This gives engineers greater freedom to increase intake size without triggering a check engine light.
With the MAF constraint addressed, Banks developed a substantially larger intake system featuring what it calls the Super Tube.
The larger intake path is designed to increase airflow capacity compared with the factory system while maintaining compatibility with the truck's engine management strategy.
Banks says the Ram-Air intake flows 58% more air mass than stock without triggering a check engine light.
That increase is presented as the primary advantage of combining the larger intake architecture with the Air Mass Control Module.
According to Banks, the increased airflow contributes to improved power, throttle response, and fuel economy.
The system is designed to reduce intake restriction and deliver more air mass while maintaining proper operation of the truck's MAF-based engine controls.
The Banks Ram-Air intake described in the video is designed for 2020 through 2023 Chevrolet Duramax L5P trucks.
Banks also describes the system as 50-state emissions compliant, combining the larger intake design and Air Mass Control Module with emissions-legal operation.
