RVNG S58/B58 INTAKE MANIFOLD EVAP BLOCK-OFFRVNG S58 B58 Intake Manifold EVAP Block Off Clean up your engine bay and properly seal unused intake manifold ports with the RVNG B58 S58 Intake Manifold EVAP Block Off Cap. Designed specifically for builds that remove the factory EVAP lines running across the intake manifold, this solution provides a clean, professional, and leak free way to eliminate exposed manifold ports without relying on temporary or improvised fixes. Precision engineered for