Cavity Plug for Holley ECM Connectors – Pack of 25

These are the cavity plugs needed to ensure your Holley Terminator X, Dominator and HP ECM connectors stay water tight when you have unused pin positions.  This is a pack of 25 plugs that work in the J1A, J1B, J2A, J2B, J3 and J4 connectors (but not main power).