UPR 1986-1995 Ford Mustang F-150 SBF Thermactor Plug - 5/8-11 Male Thread , 7/16-14 Female Thread - Steel and Black Zinc

Thermactor plugs are used to plug off air passages found in small block Ford cylinder heads and are also used to reduce the thread size in the head when using the factory accessory drive brackets on the front of the engine. Made from Steel and are black zinc plated.

Installs 20 minutes or less

Product Features:

» Sold individually
» 5/8-11 Male Threads
» 7/16-14 Female Threads
» Made from Steel and Black Zinc Plated
» Emissions legal heads will have 2 air ports in them (1 front 1 rear)

Fits These Vehicles:

1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 Ford Mustang F150 Thunderbird

5.0 302 5.8 351 Small Block Ford