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The Wehrli Custom Fab Stage 2 4" intake kit for 2001–2004 GM LB7 6.6L Duramax, shown in Illusion Purple, replaces the factory plastic intake with fabricated aluminum piping and an air box. The assembly includes a dry filter with a pre‑filter, a high‑flow 4" turbo intake horn, and hardware for bolt‑on installation, improving airflow, turbo response, and intake temperatures without tuning.
Wehrli 01-04 Duramax LB7 4in Stage 2 Intake Kit w/ Air Box - Illusion Purple
