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.
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.
Big-Ass Oiled or Dry Filter, Cold Air Intake System
2025-26 Chevy/GMC 2500/3500 6.6L Duramax, L5P
Improves turbo response, fuel economy and widens powerband. Patented electronics make it possible.
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.
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.
Overall rating: 4.8461537 / 5 from 13 reviews.
Review topics: [fit, customer service, sound, install, feel, banks, check engine light, intake, engine bay].
"Ordered and installed this on my 2026 Sierra 2500 as soon as it became available, and it's a game changer. The install was super easy, and the results were immediate. Throttle response improved instantly. The engine can finally breathe. I've installed just about every CAI on the market over the years, and the Banks is hands down the best one I've ever put on a truck."
"Well it's finally here, had the truck almost a year and was excited to install this monster. . . great construction and straight forward on the install, after disconnecting the batteries. The sound awesome with min throttle input already see mpg's climbing with increased response. feed back- slight mod needed on the lower box , sized the hole from shipped to a 3/4 ( with varibit) then installed grommet fairly easy. filter gasket slightly oversized and almost pushed out the top but tucked back in. excited for the miles"
"I finally got around to installing the Banks Monster exhaust and intake, and all I can say is wow — it completely woke my truck up. The sound is incredible, and I love being able to hear that deep rumble in the cab. I’m running the Banks PedalMonster and High Output Derringer on my 2025 GMC L5P, and the difference is unreal. The power, throttle response, and overall driving experience are on another level with all these upgrades. Honestly, I feel like a kid again every time I drive it. I also have the Banks oil pan ready to install this week, and after seeing the quality of everything else, I’m excited for that upgrade too. Most importantly, Jay and the entire Banks team go above and beyond for their customers. Their customer service is truly unmatched, and they’ve been nothing but helpful anytime I’ve had a question or needed support. Top-notch products backed by top-notch people."
"My package was missing part number 12. Banks shipped it out fast. Great customer service. Installed in 10 min. Took truck for a test drive. I like it. I will be ordering the turbo inlet and larger piping next"
"Waited patiently for the right intake for my 2026 gmc sierra 2500 and glad I did. The missing low end torque is here. Paired with my derringer and pedal monster its a beast. Well done Banks. Well done."
"I was a little nervous with the sound as the 2025 Chevy 2500 diesel is my everyday driver and work vehicle. The sound is not bad at all, a little more noticeable when you first get on the throttle and a little more noise when the exhaust brake is engaged, sounds like a diesel truck. If your truck has high idle, its pretty loud outside the truck, not much over stock in the cabin. I noticed maybe 1-3 mpg on the highway at 70MPH, maybe 2-4 at 55MPH. The fit and finish are darn near perfect, I had to do a little negotiation l to get the cover back in place on the passenger side battery. The A/C lines on my truck also needed some negotiation. No check engine lights after an extended test drive which is a huge plus!"
"Put this in my 2026 AT4x AEV over the weekend. Everything went together great, minimal massaging on the AC line near the turbo inlet. I did question the MAF fitment a bit, as it seemed to not sit down far enough in the intake tube. Banks called me on a SUNDAY and assured me that it is fine. Great customer service. Performance notes- I get a bit more hissing from the turbo with the windows down and a deep tone when I let off the throttle. It is not super loud - but does sound better. Shifts feel a bit smoother between gears - this could be in my head though? The power just feels good - coupled with my Pedal Monster / iDash setup to monitor. MPG to work improved today by 2. 9mpg. Same route, traffic, cruise control speed, etc. I never got over an 18. 5 on that route before and hit 21. 4 when I pulled into the parking lot today. I will have to hand calculate as I am unsure if the MAF piggyback with this intake kit is skewing some of those numbers. Overall, I am very happy. The intake is MASSIVE and really cleans up the rest of the engine bay."
"Just put on my 2025 silverado 2500 and what a difference in throttle response. Truck sounds much better now, can actually hear the turbo. Cleans the engine bay up as well. Excited to see the fuel savings. Very happy with it. This is coupled with the banks turbo inlet pipe."
"I purchased the Banks Ram Air on the first day it was released after waiting months for its launch, and it has proven to be a worthwhile investment. Since installing it, I’ve noticed noticeably smoother acceleration along with an increase of approximately 3–4 miles per gallon in fuel economy."
"Ordered the Ram-Air Cold Intake for 2026 GMC 2500 6. 6L Duramax L5P the day it became available. The YouTube video explaining the install steps made installing very easy. Took it out for a 90 min test drive. What I noticed right away was how smooth the engine sounded as I drove through my area to get out on the freeway. Stepping on it as I was exiting the freeway on-ramp getting up to 75 mph was smooth and effortless. So far very pleased with the overall ordering process, install, and the high quality of this product."
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