Edelbrock 7116 Performer RPM Vortec Intake Manifold Single four-barrel for the street rod, marine and engine swap market engines Broad power band makes Performer RPM ideal for street or strip Manifold accepts square-bore carburetor only Intended for high-performance street or marine engines operating from idle to 5,500 RPM Not for emissions-equipped engines and has no provision for exhaust-heated chokes