Chevy GM LS1 LS2 LS6 4500 HiRise Intake Manifold [Satin] Speedmaster one-way check valves are

Speedmaster one-way check valves are designed to prevent the back flow of any fuel

Comes complete with a 100 micron filter with is removable for cleaning

heat-treated to a maximum strength of 190

Solenoid and RPM switch sold separately

the major drawback with spray-bar type nitrous systems

Chevy GM LS1 LS2 LS6 4500 HiRise Intake Manifold [Satin] Speedmaster one-way check valves areThese Speedmaster Shootout Series Manifolds are designed to use a dominator style carburetor. It has a carb flange that accommodates a Dominator carburetor. This manifold also has pads on the ports which can be drilled and tapped for nitrous nozzles or it is available from Speedmaster machined for injector nozzles. Use the Speedmaster Complete Fuel Rail Kit with this manifold.