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Boost Tube Upgrade Kit, Red powder-coated (Set) for 2020-2021 Chevy/GMC 2500/3500 6.6L Duramax, L5P

Boost Tube Upgrade KitRed powder-coated (Set)for 2020-2021 Chevy/GMC 2500/3500 6.6L Duramax, L5P


Increases throttle response and reduces turbo lag

Banks massive 3.5" boost tubes are the largest on the market, flowing 87% more air than stock! Smooth mandrel-bent tubes deliver more air to your engine while reducing boost pressure loss resulting in quicker turbo spool and more power.

Estimated ship date Fall 2021
Please Call for Availability


Banks Boost Tubes are the largest tube in the industry at a full mandrel bent 3.5" compared to competitors’ 3” and the stock 2.5" crush-bent tubes. Made of high-quality aluminized steel, Banks Boost Tubes allow for a quicker turbo spool by improving boost pressure retention (increasing air density) between turbo, intercooler, and intake resulting in maximum horsepower.

The Banks Tube Upgrade Kit works with the stock Duramax intake elbow and intercooler by using proprietary high-strength 5-ply silicone couplers and unique to the 2020+ model, a pair of billet aluminum cold-side adapters. These couplers for the intercooler connection and the throttle body openings, are specially made for the airflow requirements on the L5P and feature a venturi-like taper on their inside diameter maintaining boost pressure and volumetric flow. 

  • Allow the turbocharger to spool up faster
  • Huge increase in size and flow over stock and competitors (3.5" vs 2.5")
  • Billet venturi couplers maintain boost pressure
  • Improves airflow
  • Greater cooling capacity
  • Mandrel-bent aluminized steel construction
  • Constant diameter tubing for the best flow
  • 5-ply heavy-duty silicone couplers
  • Spring-loaded constant tension clamps
  • Bung for a temperature probe
  • Compliments Derringer Tuner, Ram-Air Intake , and Monster Exhaust


  • Diameter: 3.5-inch
  • Material: Aluminized Steel
  • Finish: Red powder-coated

Larger Diameter:  

  • Banks: 3.5-inch diameter
  • Stock: 2.5-inch diameter

A better flowing intercooler tube results in less boost pressure loss allowing for more air and fuel to be delivered to your engine. The result is maximum, and an improved turbo response and pedal feel,

Works with:
 - Stock intercooler
 - Stock intake elbow

Shipping Information

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