Power Valve Plug - Holley, Ford/Autolite
Our Part # 3666B

Fits:
Ford Motorcraft Autolight 4100 carburetors
Ford Motorcraft Autolight 2100, 2150 carburetors
Holley 2300 carburetors
Holley 4150, 4160 carburetors
Holley 4165, 4175 carburetors
Holley 4180, 4190 carburetors
Holley 2 bbl carburetors
Holley 4500 Dominator carburetors

Quantity: 1 plug & 1 gasket
Over All Length: .730"
Plug head width: 1"
Thread size: 1/2"-28

Note:
Main jetting will need to be increased 6 to 8 sizes when plug is used.