Banks Ram-Air® Intake 2025-2026 L5P Duramax 2500/3500

Banks Ram-Air® Intake 2025-2026 L5P Duramax 2500/3500

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Key Features

Only intake that improves mass air flow over stock
Improves turbo response
Improves fuel economy
Massive filter extends service life, fewer cleanings
Housing keeps out hot air
Housing increases air volume around filter
Connects to OEM hood scoop
Rubber elbow allow for engine movement
Increased turbo sound, no drone
Oiled or dry high efficiency filter
No check engine light
Includes Banks Air Mass Control Module
Includes Banks Crankcase Ventilation Control Module
U.S. Patent 11,193,441

Why You Need It

The Ram-Air intake system for the 2025-26 Duramax 6.6L widens the powerband, sharpens turbo response, and improves fuel economy by improving air mass flow to the turbo. This is made possible by our patented Banks Air Mass Control Module and Crankcase Ventilation Control Modules. Meanwhile, all competitors must retain near stock airflow or risk setting a check engine light.

Why It's Better

Only intake that improves mass air flow over stock
Improves turbo response
Improves fuel economy
Extends service life, fewer cleanings
Housing keeps out hot air
Increases air volume around filter
Increased turbo sound, no drone
No check engine light

Helps engine produce horsepower at lower RPM

Thanks to a 45% reduction in pressure loss over the stock intake, air mass is increased into the turbo inlet. This denser air makes the turbo's job easier. Turbo lag is reduced and boost comes on sooner, widening the engine's working RPM range.

Not only does power come on sooner with the Ram-Air intake, but the turbo spins nearly 3,000 RPM slower increasing its efficiency and longevity. Turbo life is increased because it’s spinning millions of revolutions less over its lifetime.

Patented Electronics

The ECM (Engine Control Module) in your 2025-26 Duramax monitors air mass and pressure so closely that any deviation from stock results in a check engine light. The truck's ultra-stringent ECM even monitors variations in crankcase ventilation pressure as another trigger for a trouble code. To overcome these new limitations, we employ our patented Banks Air Mass Control Module, which corrects for the increase in mass air flow to the turbo's compressor.

The Banks Crankcase Ventilation Control Module is a patented electronic device designed to work with the Banks Air Mass Control Module. Developed in-house and manufactured locally, the Crankcase Ventilation Control Module allows for modifications to the intake system without triggering diagnostic trouble codes like P04DB (Crankcase Vent System Disconnected) or related check engine lights and reduced engine power modes that plague other aftermarket intakes systems.

Late-model 2025+ Duramax trucks feature ultra-stringent ECM oversight of crankcase pressure, ventilation flow, and blow-by gases via integrated sensors in the CCV system. Any non-stock alteration—like rerouting for better oil separation, increased ventilation capacity to handle higher boost/performance, or integration with high-flow intakes—risks the ECM detecting "out-of-range" pressure or flow deviations. These deviations result in a check engine light to protect emissions compliance.

—U.S. Patent 11,193,441

Massive Airflow

In other words, all other competitive intakes must flow within a narrow airflow window near stock levels past the Mass Air Flow sensor, whereas these stock airflow design constraints do not limit us.

Unrivaled Size and Capacity

The all-new Ram-Air cold air intake system's large organic shape eliminates all restrictions and turbulence to the turbo. The radical new design allows for a massive 58% gain in Mass Air Flow over the stock system.

The oversized filter has greater dust capacity giving you more miles between services and flows freely long after stock and competitors are clogged with debris.

The huge filter outlet smoothly tapers down providing the highest gains in air density.

Your Stock Intake is Restrictive

The Duramax OEM air filter housing is a bulky multi-piece design with harsh bends, corners and is designed for dust collection, not performance. The air path is compromised by resonators and silencers in an effort to keep noise at a minimum.

While the factory design does have inlets that mate to the hood's air scoop, its square filter and S-shaped flow path induces turbulence and drag to the intake system lowering Mass Air Flow.

The Devil's in the Details

The new Banks Ram-Air system features a durable heat-resistant Cross-Linked Polyethylene enclosure with a smooth organic shape that maximizes cool air volume around the filter and maintains air density into the box itself.

The top hood scoop duct now dumps directly into the airbox chamber, improving the ram-air effect at speed.

A side fender inlet away from engine heat further lowers the pressure drop in the system while also letting you hear your turbo better

Exclusive Bellows Free Performance

Standard factory style bellows induce drag to the intake. This added turbulence affects the boundary layer on the inside of the intake reducing the effective diameter for air to flow through.

Air Mass Matters

The greater the air mass entering your engine, the less fuel your engine will consume. That also means less engine heat going into the engine oil and coolant system since it is working less hard to make the same horsepower. In other words, improved fuel economy and less stress on the engine itself!

A Big Filter — Engineered Right

The Banks Super-Tube fits perfectly over the top of the filter which has an integrated collar to smoothly transition airflow from the air box and into the turbo with the lowest resistance and drag.

The massive filter sits angled down in the air box to discourage dirt and debris from getting wedged between the pleats and Its massive51in2filter outlet Filter has overtwicethe airflow area of any competitor.

Bigger is Better When Properly Engineered

While other brands go for bragging rights for the "biggest" by cramming more pleats into their filters, they end up designing one that gets clogged faster and flows less air.

Just having a big looking filter, does not mean it will perform the best.

Banks massive filter has an optimized ratio of filter surface area, pleat count, and media thickness allowing it to outflow every other filter tested while breathing evenly from all sides. Banks wins again.

Fitment Note

Ram-Air is not compatible with catch cans including VSE.

Specifications

Brand new for the 2025-26 Duramax L5P platform, the Banks Ram-Air intake is a game-changer. With the 2025 model year Duramax engines, GM added a new sensor into the intake system to monitor Crank Case Ventilation Pressure. To get past this airflow limitation, we engineered a new patented Air Mass Control Module and a Crankcase Ventilation Control Module that allow the intake to go beyond these limitations for truly unmatched airflow performance.

With a Big-Ass filter, huge induction tube and a unique bellowed silicone coupler to allow for engine movement while tapering down to increase air density, your 6.6L engine will breathe easy and cleanly. Its enclosed housing keeps power-robbing heat away and attaches to the OEM hood and front ram-air scoops for even better performance at speed. An extra side inlet opens up to the wheel well for fresh air and a pleasant induction sound.

Features

Only intake that improves mass air flow over stock
Improves turbo response
Improves fuel economy
Massive filter extends service life, fewer cleanings
Housing keeps out hot air
Housing increases air volume around filter
Connects to OEM hood scoop
Rubber elbow allow for engine movement
Increased turbo sound, no drone
Oiled or dry high efficiency filter
No check engine light
Includes Banks Air Mass Control Module
Includes Banks Crankcase Ventilation Control Module
U.S. Patent 11,193,441

Duramax

Powerstroke

EcoDiesel