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The Wehrli Custom Fab 4in intake kit with air box for 2004.5-2005 Duramax LLY replaces restrictive plastic factory components with a fabricated aluminum pipe and sealed air box to increase airflow to the turbo. Larger 4in piping, smooth bends and a dry filter with hydrophobic pre-filter reduce intake temps and improve throttle response, while a removable lid eases inspection and maintenance.
Wehrli 2006-2007 LBZ Duramax 4in Intake Kit with Air Box- WCFab Grey
