Banks Ram-Air Intake Systems, 2020-2023 L5P

Part# 42266

$549.00 Includes Free Shipping.

WARNING: Cancer and Reproductive Harm - www.P65Warnings.Ca.Gov

Fits: 2020 thru 2023 Chevy Silverado/GMC Sierra 2500HD/3500HD L5P Duramax Diesel

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.


  • 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 or Dry Air Filter Element
  • 5-year Limited Warranty
  • No Check Engine Light
  • US Patent #11,193,441


  • Pending Carb Approval
  • *This product is ONLY designed for closed course racing where it is legal to do so. Any other use will be in violation of local, state, and federal laws. We are not responsible for unlawful use of this product.


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


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. The Big-Ass filter 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 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. And, 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 reducing air density.


The Devil's In The Details

The new Banks Ram-Air system features a durable heat-resistant enclosure. Its a smooth organic shape maximizes cool air volume around the filter while maintaining air velocity into the box itself. The new Big-Ass filter offers greater dust capacity while minimizing flow restriction.


Exclusive Bellows Free Performance

Standard factory style bellows induce drag to the intake. This added turbulance effects the boundry layer on the inside of the intake reducing the effective diamater for air to flow through. Banks' huge tapering intake elbow with exclusive bellows slides over the Banks Super-Tube allowing for both 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.


Air Mass Matters

The greater the air mass, the less fuel your engine will consume to make the same horsepower. In other words, fuel economy! 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. Pressurized, cool, dense air is the winning combination.


A Big Filter Engineered Right

The Big-Ass filter sits angled down in the air box to discourage dirt and debris from getting wedged inbetween 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.


Bigger is Better When Properly Engineered

Just having a big filter, does not mean it will perform the best. While other brands go for bragging rights for the "biggest filter" and cram more pleats into their filters, they end up designing a filter that gets clogged faster and flows less air. Bigger is only better when designed properly. Our competitors have swung for the fences and whiffed.


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.