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Our Race Line fans were designed for heavy-duty applications where a Slim Line fan just won't cut it
hardware and fittings for an easy installation
Diesel Engine Runaway is caused when external hydrocarbons are drawn into the engine and can cause overspeeding and catastrophic engine failure
Stainless steel mounting hardware is included
Outflows Stock Intercooler Tubes
Wehrli Custom Fab WCF100344-FB 4" Intake Kit W/Air Box - Flat Black CORE-1200 Our Race Line fans wereUpgrade the intake and air box on your GM 6. 6L Duramax today with the Wehrli Custom Fab WCF100344 FB 4" Intake Kit W Air Box Flat Black from GAP. This high flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly replaces your diesel's restrictive plastic factory parts for improved engine performance. The new design significantly increases air flow to your turbo, producing improved horsepower and torque, quicker throttle