About This Product

A groundbreaking cold air intake featuring the patented Banks Air Mass Control Module. The electronic device allows our engineers to use the Banks SuperTube, a massive free-flowing intake tube, larger than stock and all competitors. No other cold air intake even comes close in size or airflow. Adds power, sharpens turbo response, and improves fuel economy. Beats stock and competitors in mass airflow, pressure retention, and dirt capacity. Provides a strong induction note.

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

Specifications

Brand new for the 2020-2023 Duramax 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.

Why It's Better

Patented Electronics

The ECM (Engine Control Module) in your 2020-23 Duramax monitors air mass and pressure so closely that any deviation from stock results in a check engine light.

The new patented Banks Air Mass Control Module allows our engineers to design past this electronic limitation.

—U.S. Patent #11,193,441

Hand holding the Banks Air Mass Control Module for scale

Massive Airflow

In other words, all other competitive intakes must flow the same as stock 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.

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

Your Stock Intake is Restrictive

The 2020-23 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 massive 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 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.

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.

Banks L5P Ram-Air filter size comparison

For information on other Duramax Cold Air Intake Systems, visit bankspower.com/collections/duramax-intakes

Installation and Support

Owners Manual and Install Video, Banks Ram-Air for 2020-2023 6.6L Duramax L5P

Banks Ram-Air®

Cold Air Intake w/ Massive Oiled/Dry Filter, Super Tube, & Air Mass Control Module

SKU #42266

2020-2023 Chevy/GMC 2500/3500 6.6L Duramax L5P

Adds power, sharpens turbo response, and improves fuel economy. 58% air mass flow gain over stock.

Ships 7-10 Days

$495.00

MSRP: ~~$550.00~~

Choose Your Banks Ram-Air®

Your Selection: Oiled

Oiled$495.00

Dry$495.00

Pre-Filter

$44.08

MSRP: ~~$48.98~~

Big-Ass Filter for Banks Ram-AIr 41829 and 41829-D

Replacement Air Filter Element

$139.00

MSRP: ~~$154.44~~

MAP Sensor Relocation Kit (Upper Sensor Only)

$69.00

MSRP: ~~$76.67~~

Floating assembled photo of the Banks Boost-Tubes for 2020+ L5P Duramax

Boost Tube Upgrade Kit

$698.00

MSRP: ~~$775.56~~

42792 Monster-Ram Turbo Inlet for L5P DUramax

Monster-Ram Turbo Inlet Elbow

From $289.00

MSRP: ~~$321.11~~

5 inch Monster Exhaust for 2020-2023 Chevy/GMC 2500/3500 Single Rear Wheel

Monster Exhaust System

$628.00

MSRP: ~~$697.78~~

GOT QUESTIONS?

Talk with our experts

call 800-601-8072

50 state compliant

D-161-157

Free Shipping on orders over $250 (48 Contiguous US)*

installation manual

frequently asked questions

California Prop 65 Warning

Customer Reviews

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Highest rating

Image of Review by cory m. on November 04, 24

Published date

11/04/24

Great product

Was thoroughly impressed by this product shipping was fast and product packaging was great. Installation of the product was straightforward and simple.

cory m. 🇺🇸

Verified Buyer

Was this review helpful?

Image of Review by Randy F. on June 27, 24

Published date

06/27/24

Ram Air for 2021 Duramax

Straightforward install with detailed instructions. Got this for my birthday for my diesel Silverado 2500hd. Product is well made. Not sure if I’m getting more power or better mileage, but I love the way it sounds!! Definitive growl on deceleration!! Thanks Banks team- will be looking to you for future...

Randy F. 🇺🇸

Verified Buyer

Was this review helpful?

Image of Review by Engbert B. on June 24, 24

Published date

06/24/24

I think fuel increase is

I think fuel increase is there. Sounds way better. Overall good purchase

Engbert B. 🇺🇸

Verified Buyer

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Image of Review by Kenzie w. on June 09, 24

Published date

06/09/24

Awesome cold air intake

I love the monster air filter. The only thing I would change is the front inside bolt is very hard to get it started..

Kenzie w. 🇺🇸

Verified Buyer

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Published date

05/27/24

Banks Ram Air 2500HD Duramax

Eazy to install!!! sounds great with a deep throaty sound

Steven M. 🇺🇸

Verified Buyer

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Image of Review by James T. on May 18, 24

Published date

05/18/24

Ram air :)

I installed this ram air intake along with the new boost tubes and it really looks good and performs great. The intake fits as well as the factory, maybe even better. There was no noticeable noise increase over stock while driving.

James T. 🇺🇸

Verified Buyer

Was this review helpful?

Image of Review by Randall K. on March 25, 24

Published date

03/25/24

2021 Duramax 2500 Banks Ram Air Intake

I’m really surprised at what a difference it made, easy install. Makes a very deep sound now and a little more turbo noise. Increased the mpg as well. Overall Banks never disappoints, this banks ram air is paired with pedal monster and derringer! It’s all a must have

Randall K. 🇺🇸

Verified Buyer

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Image of Review by George S. on February 19, 24

Published date

02/19/24

Banks = Amazing!!!

Third round with Banks and I’ve loved every tire I’ve lost due to the power I’ve gained! My 23 3500 Denali was less than thrilling even with Derringer and Pedal Monster. Added the ram air and Holy S#*., this truck is ALIVE! Genius!! The quality and fit could not be purchased anywhere else. Thank you...

George S. 🇺🇸

Verified Buyer

Was this review helpful?

Image of Review by Garrett W. on December 08, 23

Published date

12/08/23

Extremely easy installation, definitive noise,

Extremely easy installation, definitive noise, not sure how it affects mileage yet as I just put it on Tuesday. Time will tell, but truck overall is much more audible. Highly recommend! Purchased with the pre filter as well as I always use them.

Garrett W. 🇺🇸

Verified Buyer

Was this review helpful?

Banks are engine people. In a world of companies making disparate parts, Banks engineers the entire engine, not just its components. The proof of Banks’ expertise is its list of national championships and world records as well as the biggest military engine contract of the century. Of all the possible options, the U.S. military chose the Banks D866T engine for its high performance and durability. With over 66 years of breakthroughs and patents in high-performance gas and diesel engine development —including turbocharging and drivetrain, Banks has no rival.

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XTNTNT1120W

Patented Electronics

Massive Airflow

Unrivaled Size and Capacity

Your Stock Intake is Restrictive

The Devil's in the Details

Exclusive Bellows Free Performance

Air Mass Matters

A Big Filter — Engineered Right

Bigger is Better When Properly Engineered

Banks Ram-Air®

Choose Your Banks Ram-Air®

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2017-2019 Ford 6.7L Power Stroke and 2020-2022 Chevy/GMC 6.6L L5P
Air Filter PN: 41829/41829-D

Banks Ram Air 2020-2023 L5P Duramax