3.5 inch Turbo Intake Horn for the 2020+ L5P Duramax with factory style Turbo. Improves air flow to turbo by removing restriction found in the factory horn right before the turbo inlet. Tuning not required, this horn will work plug and play tuners or OEM calibration.
Reviewed by: tradd07/30/2021 03:55PM
Product ownership: Less than 1 month
Purchased from: Wehrli Custom Fabrication - WCFab
Purchased this with the two intercooler pipes, but put this on first. This, along with the Banks Derringer tuner, gave an instant boost pressure bump and more roar from the turbo. I may or may not have plugged the PCV input temporarily to see if it made a difference or not.....it did. I'm looking forward to the WCFab cold-air intake for the '21 L5P to match up with this.
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