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Shatter restrictive, necked-down factory induction bottlenecks and optimize your turbocharger’s volumetric efficiency with custom high-flow intake air horns from VSE Engineering. Stamped factory plastic and cast intake connections generate severe internal airflow turbulence that delays turbocharger response curves and increases driving pressure under load. To fix this, our in-house engineered intake air horns feature smooth, oversized transitions and mandrel-bent profiles developed via rigorous 3D modeling and chassis dyno validation. Machined with high-precision O-ring sealing flanges and integrated surge guard tracks, these heavy-duty upgrades drop turbo spool times, reduce sustained exhaust gas temperatures (EGTs) on steep grades, and straighten out incoming air velocity completely to provide an unrestrictive charging path that perfectly feeds your custom performance tuning lines.