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Ships within 48 hours · Estimated delivery Aug 5 - Aug 10
New gaskets are available separately below (see related products)
3 inch stainless constant-diameter direct-fit resonator-back system cuts backpressure up to 79 percent and flows up to 138 percent better
6L Duramax LMM using the most up-to-date engineering tools and techniques to provide you with the perfect blend of power and protection
5 Inch Dual Split Rear with CF Tips
Wehrli Custom Fab WCF100192-GRY 4" Intake Kit W/Air Box - WCFab Grey Serial Number Required New gaskets are available separatelyModify your GM 6. 6L Duramax today with the Wehrli Custom Fab WCF100192 GRY 4" Intake Kit W Air Box WCFab Grey from GAP. This high flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts on your diesel for improved engine performance. This design significantly increases airflow to your turbo producing improved horsepower and torque, quicker throttle response, and cooler intake