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The Wehrli Custom Fab Stage 2 4" intake kit for 2001–2004 GM LB7 6.6L Duramax installs with an air box and dry filter assembly to replace restrictive factory plastic parts. Its large‑diameter 4" piping, aero bends, and high‑flow horn improve airflow to the turbo for increased horsepower and torque, quicker throttle response, and cooler intake temps while remaining bolt‑on and compatible with OEM IHI‑style turbos.
Wehrli 01-04 Duramax LB7 4in Stage 2 Intake Kit w/ Air Box - Gun Metal
