What size hole does this plug fit?

It fits a 1-15/16 inch bore. The plug measures about 1.94 inches at its smallest and 1.953 inches at its largest diameter.

Is steel the right material for my engine?

Steel matches cast-iron blocks and heads and is fine for stock replacement. In aluminum engines or coolant passages exposed to long service, brass or stainless plugs resist corrosion better.

How many plugs come in the pack?

Ten. That covers a full set of core holes on many engines, with spares left over.

Do I need sealant when installing them?

The plugs come bare. Many installers use a gasket sealant or thread sealant on the seating edge, but follow your service manual's procedure for cup plugs.

How do I install a cup expansion plug?

Drive it in squarely with a driver sized to the plug's face until it seats evenly in the bore. Cocking it sideways causes leaks.

Will this fit my specific car?

Dorman lists the years, makes and models it fits. Check your engine's bore size and the plug location before ordering, since one engine can use several sizes.