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Quantity
1
Banks massive 3.5" boost tubes are the largest on the market, flowing 26-45% 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.
Reviews
4.7
78 ratings
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2021 GMC Sierra 2500 HF
Just had a Banks boost tube upgrade kit installed on my 2021 GMC Sierra Denali 2500HD Duramax and the quality of the kit is excellent. Much stronger than the factory tubes and the fitment is perfect. Definitely a solid upgrade
J
Jorge · March 7, 2026
Great Upgrade!
Definitely had made a differende in performance! Along with the pedal Monster and Ram Air Intake, Truck is pretty snappy!