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Banks Ram-Air®

Buy Now For $549.00

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Banks Ram-Air®

Buy Now For $549.00

Add To Cart
Banks Ram-Air<sup>&reg;</sup>
Banks Ram-Air<sup>&reg;</sup>
Banks Ram-Air<sup>&reg;</sup>
Banks Ram-Air<sup>&reg;</sup>
Banks Ram-Air<sup>&reg;</sup>
Banks Ram-Air<sup>&reg;</sup>
Banks Ram-Air<sup>&reg;</sup>

Banks Ram-Air®

Increases Mass Air Flow By 58% vs Stock
Big-Ass Oiled Filter, Cold Air Intake System
For 2020-2023 Chevy/GMC 2500/3500 6.6L Duramax, L5P
Prices increase after 3/31


Add Ons

No add-ons selected
Prevents debris entering pleats.
Extends cleaning intervals.
Replacement Air Filter Element
Replacement Air Filter Element
Add a spare Oiled Filter to your order
Floating assembled photo of the Banks Boost-Tubes for 2020+ L5P Duramax
Boost Tube Upgrade Kit
Increases throttle response and reduces turbo lag
5 inch Monster Exhaust for 2020-2023 Chevy/GMC 2500/3500
Monster Exhaust System
9% less backpressure at turbine, 15% lower exhaust exit temp
Free Shipping on orders over $100 (48 Contiguous US)*

A groundbreaking cold air intake featuring the patented Banks Air Mass Control Module. The electronic device allows our engineers to design past stock size and airflow limitations, putting the Ram-Air system in a league of its own. No other intake even comes close. Adds power, sharpens turbo response, and improves fuel economy. Beats stock and competitors where it matters most; mass airflow, pressure retention, and dirt capacity. Provides a strong induction note.

US Patent #11,193,441

49 State Compliant

California Compliance in Progress

Fitment Note


Brand new for the 2020-2023 L5P platform, the Banks Ram-Air intake is a game-changer. With 2020 and up Duramax engines, GM has further tightened the allowable range for induction tuning. To counter this, Banks engineers have designed a new patented Air Mass Control Module that allows an intake design 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 airbox design keeps power-robbing heat away and attaches to the OEM hood and front ram air scoops for even better performance at speed on the highway. An extra side inlet opens up to the wheel well for fresh air and a strong induction note sound.

Key Features

  • Includes brand new Patented Banks Air Mass Control Module
  • "Big Ass Filter" Extends service life and requires fewer cleanings
  • Enclosed housing keeps out hot, power-robbing engine air
  • Unique EPDM elbow with exclusive bellows for engine movement
  • Oversized airbox increases cool air volume around filter
  • Massive two piece XLPE airbox for easy servicing
  • Connects to OEM hood and forward ram air scoops
  • More audible and aggressive induction note
  • Oiled Air Filter Element
  • 5-year Limited Warranty
  • No Check Engine Light
  • US Patent #11,193,441

Questions? Contact Support

Patented Electronics

The ECM (Engine Control Module) in your 2020-22 Duramax monitors air mass and pressure so closely that any deviation from stock results in a check engine light. This means that competitive aftermarket intakes must flow the same as stock.
The new patented Banks Air Mass Control Module allows our engineers to design past this electronic limitation. In other words, we are not limited by stock airflow constraints.
—U.S. Patent #11,193,441
Hand holding the Banks Air Mass Control Module for scale

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 Big-Ass 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.
42266, 42266-D, Banks Power, Ram-Air Intake, GMC L5P, Chevrolet L5P, Banks Ram-Air Intake

Your Stock Intake is Restrictive

The 2020-22 Duramax OEM Air Box 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.
Side XRay View of OEM vs Banks Ram-Air L5P Intake

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.
Top XRay View of OEM vs Banks Ram-Air L5P Intake

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.
Banks' huge tapering intake elbow with exclusive bellows slide over the Banks Super-Tube allowing for free engine movement and unobstructed airflow into the turbo.
The elbow is made from EPDM synthetic rubber instead of silicone for greater environmental resistance and strength against damage or collapse under vacuum.
Top XRay View of OEM vs Banks Ram-Air L5P Intake Showing CFD effect of bellows

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!
Yes, airflow (CFM) is important, but if the system flows more air, and that air is hot, you'll likely see a loss in horsepower and more stress on your engine.
Pressurized, cool, dense air is the winning combination. To learn more about air density, see this article.
Stock vs Banks Ram-Air intake photo showcasing radical new design

A Big Filter — Engineered Right

The Big-Ass filter sits angled down in the air box to discourage dirt and debris from getting wedged between the pleats and Its massive 51in2 filter outlet Filter has over twice the airflow area of any competitor.
The Banks Super-Tube fits perfectly over the top of the Big-Ass Filter which has an integrated collar to smoothly transition airflow from the air box and into the turbo with the lowest resistance and drag.
Banks Ram-Air Intake Tube and Filter Next to a can for scale

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.
The Banks Big-Ass 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.
Banks L5P Ram-Air filter size comparison
Banks Air Filter Test vs aFe and S&B

For information on other Duramax Cold Air Intake Systems, visit