A high-flow intake system for 6.7 Cummins is designed to improve the path of air entering the engine. It can be a useful upgrade for Ram 2500 and 3500 trucks, particularly when the truck is used for towing, heavy-duty work, or has other airflow-related modifications.

Improve Airflow

The factory intake system is designed for everyday operation, but aftermarket components can provide a larger and smoother airflow path. A high-flow setup may include an upgraded cold-air intake, intake horn, intake plenum, or high-flow heater plate.

For example, Banks' Monster-Ram system for 2019-2024 Ram 2500/3500 6.7L Cummins uses a 3-3/8-inch inlet and is designed to reduce restriction between the intercooler and intake manifold. Banks reports 72.7 lb/min airflow compared with 38.6 lb/min for the stock configuration in its testing.

Better Turbo Response

A less restrictive intake path can help the turbocharger move air more efficiently. Depending on the complete engine setup, drivers may experience improved throttle response and turbo spool.

A high-flow intake system for 6.7 Cummins can also complement other upgrades such as a larger cold-air intake, upgraded turbocharger, or performance-oriented intake manifold.

Fleece Performance offers a high-flow intake plenum for 2007.5-2024 Ram 6.7L Cummins pickup and Cab & Chassis models. Its kit includes a high-flow intake plate, gaskets, sensor connections, and related installation hardware.

High-Flow Heater Options

Some complete intake systems also address the factory grid-heater restriction. Banks' system uses a high-flow billet intake plate with a vertical coil-style heater, allowing cold-start heating while reducing obstruction in the intake path.