97721 Banks Boost Tube Upgrade Kit for 2020-2024 Chevy/GMC 2500/3500 6.6L Duramax L5P
INSTALL INSTRUCTIONS
Part #s
26005
Banks High-Flow Boost Tubes 2020-2024 Chevy/GMC 2500/3500 6.6L Duramax, L5P
Please read through the following instructions thoroughly before starting your installation. If you have any questions please visit our Support Page.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/11/26005_Assembled-1-800x800.jpg)
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-ToolsRequired-1024x616.jpg)
Required Tools
- ½” Breaker Bar
- 7, 10, 11, 22mm Sockets
- 16mm wrench
- Ratchet and extension
- Flat blade screwdriver
- T-15 Torx
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2024/03/26005_BOM_Photo-1024x788.png)
Bill of Materials
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/11/26005_Assembled-BOM-1024x1024.jpg)
Section 1: Preparing for Installation
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2023/04/Banks-26005-Section1-3-1024x606.jpg)
1. Secure the truck on a lift and remove both front wheels to allow for full access.
To remove the fender well, you will need a T-15 Torx bit.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section1-3-1024x618.jpg)
2. Remove both of the front fender liners.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section1-5-1024x573.jpg)
3. Using a 10mm socket, loosen and remove the negative terminal on the driver’s side battery.
Then move to the passenger’s side, and do the same on the 2nd battery.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section1-7-1024x630.jpg)
4. Disconnect the mass airflow sensor (MAF) from the factory intake box.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section1-8-1024x620.jpg)
5. With a flat blade screwdriver or 8mm socket, loosen the hose clamp holding the intake tube to the turbo inlet.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section1-9-1024x610.jpg)
6. Loosen the nut on the front airbox.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section1-10-1024x667.jpg)
7. Using a 10mm deep wall socket, loosen the nut holding the front of the air intake housing.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section1-11-1024x647.jpg)
8. Starting at the turbo inlet, remove the factory air intake system.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section1-12-1024x636.jpg)
9. Then lift the intake assembly out of the engine bay, removing the whole thing from the truck.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section1-13-1024x577.jpg)
10. Disconnect the temperature sensor, and pull it back to release.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section1-15-1024x553.jpg)
11. Release the clip to free the OEM tube from the throttle body.
Pull the upper clip from both sides and pull it back to remove.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section1-16-1024x636.jpg)
12. Release the clip to free the OEM tube from the intercooler outlet.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section1-17-1024x652.jpg)
13. Remove the cold side OEM tube from the Truck.
Section 2: Removal of the OEM hot side tube
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section2-19.0-1024x630.jpg)
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section2-19-1024x704.jpg)
1. Undo the hose clamp holding the top of the OEM hot side tube to the turbo discharge.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section2-21-1024x693.jpg)
2. Undo the hose clamp holding the bottom of the OEM tube to the Intercooler Inlet.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section2-22-1024x652.jpg)
3. With a side-to-side motion, pull back until it’s free.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/11/Banks-26005-Section2-22-3-1024x652.jpg)
4. Disconnect the OEM hose connected to the turbo discharge.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section2-23-1024x737.jpg)
5. Now pull the entire OEM hot side tube down and out from the Truck.
Section 3: Installing the Banks Cold Side Boost Tube
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-1024x702.jpg)
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-24-1024x752.jpg)
1. With a 16mm wrench, unscrew the temperature sensor from OEM cold side tube.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-25-1024x688.jpg)
2. Fasten it to the Banks Boost Tube.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-26-1024x775.jpg)
3. Transfer the retainer clips from both ends of the OEM tube to the Banks Billet adapters.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Important-Note-1024x585.jpg)
4. The clip off of the upper end of the OEM tube (larger clip) goes onto the Banks billet adaptor 42319.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-27-1024x666.jpg)
5. The clip from the lower end of the OEM tube, (the smaller clip) goes onto the Banks billet adaptor 42320.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Important-Note-1024x585.jpg)
Lubricate and install the O-rings on the Banks adapters. Silicone spray or engine oil can be used as a lubricant.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-28-1024x791.jpg)
6. With your thumb, proceed to push the O-ring into the groove as you push and slide it into place. The black O-ring goes on the billet adaptor 42319.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-29-1024x852.jpg)
7. The thicker orange one goes on the billet adapter 42320.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-30-1024x753.jpg)
8. Push the adapters onto the throttle body and the intercooler outlet.
Check and confirm the retaining clips “click” into place.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-31-1024x617.jpg)
9. Snap in the lower adaptor onto the intercooler, line up and push, slightly twist, as it clicks into place.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-32-1024x739.jpg)
10. Grab the upper cold side hose (94334) and two 4″ clamps (92901).
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-33-1024x668.jpg)
11. Slip the hose and clamps onto the Upper Boost Tube Adapter.
Leave them all loose for now.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-34-1024x692.jpg)
12. Grab the lower cold side Boost Tube hump hose (94293) with two 4″ clamps (92901).
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-35-1024x648.jpg)
13. Install the cold side bottom hose onto the billet adaptor connected to the intercooler with its clamps.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-36-1024x731.jpg)
14. Grab the Banks cold side Boost Tube.
You’ll want to install from underneath the truck.
Make sure that the temperature sensor has proper clearance.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-37-1024x694.jpg)
15. Slide the Banks cold side Boost Tube onto the upper cold side hose with the clamps preinstalled.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-38-1024x717.jpg)
16. Then slip the lower hose on.
Adjust the tube before tightening all of the clamps.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-39-1-1024x679.jpg)
17. Once everything is in place, tighten the clamps on the coupler.
Torque them down to 5- foot-pounds.
Start with the top clamp and then move to the bottom clamp.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-40-1024x694.jpg)
18. Move to the lower coupler on the Banks cold side Boost Tube clamps to tighten.
Start with the furthest one back, then tighten the front clamp.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section3-41-1024x683.jpg)
19. Then plug in the temperature sensor.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/19a-1024x652.jpg)
20. Then reinstall the air intake system.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/19b-1024x652.jpg)
20a. With your flat blade screwdriver or an 8mm socket, tighten the hose clamp.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/19c-1024x652.jpg)
20b. With the Ratchet and a 10mm extension, reinstall the airbox nut.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/19d-1024x652.jpg)
20c. Reconnect the Mass Air sensor (MAF).
Section 4: Installing of Banks Hot Side Boost Tube
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section4-1024x580.jpg)
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section4-42-1024x974.jpg)
1. Grab the Banks lower hot side hose (94330), and clamps (92901 & 92895).
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section4-43-1024x622.jpg)
2. Fit the Banks hose over the Intercooler Inlet with both clamps in place but loose for now.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section4-44-1024x639.jpg)
3. Grab the upper hot side Banks Boost Tube hose (94333) and clamps(92901 & 92860).
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section4-45-1024x588.jpg)
4. Fit the Banks hose (94333) over the turbo discharge with both clamps in place but leave loose.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section4-46-1024x652.jpg)
NOTE: For this next step, you will need to remove the engine computer to pass the lower hot side Banks Boost Tube through.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section4-47-1024x739.jpg)
5. Disconnect the ECM, connectors. Fully lift the tab up and wiggle free.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section4-48-1024x728.jpg)
6. Next, remove the 4 bolts that hold it in place.
Then remove the ECM from the truck.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section4-49-1024x731.jpg)
7. Grab the lower hot side Banks Boost Tube (42462-R).
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section4-50-1024x620.jpg)
8. Fit the lower Boost Tube into place by maneuvering it up from below the Truck.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section4-51-1024x769.jpg)
9. Now you will need the center hump hose (94293) and two 4″ clamps (92901 x2).
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section4-52-1024x733.jpg)
10. Slip the hump hose and clamps into place on the lower hot side tube.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section4-53-1024x611.jpg)
11. Grab the upper hot side Banks Boost Tube. (42460-R)
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section4-54-1024x651.jpg)
12. Fit the upper Boost Tube into place from the top of the engine bay.
Slip both ends of the Upper Boost Tube into the silicone hoses.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section4-55-1024x756.jpg)
13. Tighten both of the upper Banks Boost Tube clamps on turbo discharge.
Torque the clamps to 5-foot-lbs.
Section 5: Connecting the Hot Side Intercooler Boost Tubes
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section5-56-1024x600.jpg)
14. Tighten the center Boost Tube hump hose upper clamp.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section5-57-1024x651.jpg)
15. Next, tighten the center Boost Tube hump hose lower clamp.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section5-58-1024x655.jpg)
16. Tighten the bottom Boost Tube hose clamps, on the hot side intercooler.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section5-59-1024x668.jpg)
17. Now it’s time to reinstall the engine computer commonly referred to as the ECM.
Make sure not to tighten all the bolts until all 4 are seated and mostly threaded.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section5-60-1024x623.jpg)
17a. Start by hand by installing the bottom bolt in the lower right corner.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section5-61-1024x581.jpg)
17b. Next, place the 2nd bolt in the upper right corner.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section5-62-1024x696.jpg)
17c. Then place the 3rd bolt in the lower-left corner.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/Banks-26005-Section5-63-1024x630.jpg)
17d. Lastly, place the 4th bolt in the top left corner.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/18-1024x652.jpg)
18. With a ratchet, tighten all 4 of the ECM bolts.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/19-1024x652.jpg)
19. With your T-15 Torx replace the booth of the fender liners.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/20-1024x652.jpg)
20. Put both wheels back on.
![](https://banks-wp-images.s3.amazonaws.com/performance-upgrades/wp-content/uploads/2021/12/21-1024x652.jpg)
Remove the truck from the hoist, and enjoy your brand-new Banks Power Boost Tube Kit!