The rear plug of a Holley Hi-Ram is often an issue if you are not using a factory LS3 style MAP sensor. It is difficult to plug and then limits your Vacuum reference ports as well. WE have created this plug/adaptor which comes with a 1/8" NPT port for screwing in 3 Bar map sensors, push to connect fittings or plugs.
These ports have a 1/8" NPT female ports for hooking up push to connect, AN to NPT ports, and more! You can also screw an NPT style MAP sensor directly into.
This listing is for quantity one.
(1)1/4-20 Allen head Bolt
(1) Billet Adapter
(1) 1/8" NPT plug