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Larger inside diameter tubing without the turbulance of the air silencer will add a little more airflow.
Other than it looks better, I don't know if the performance gains are worth the money.
Jimmy
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.