LS1 Intake Manifold Plug with 3/8 NPT Threaded Hole Fits all LS1 and LS6 factory intake manifolds Can be used for mounting IAT sensor or as a nitrous port for fogger nozzle Natural finish aluminum as shown Includes; 1 intake plug, stainless steel bolt, and O-ring Please check out my other items for other LS block off plates etc.DNA