Crankshaft pulley with undersize crankshaft hole for worn cranks. Original shape with correct crown for the fan belt. This pulley will give you a nice tight fit for the crankshaft and crank pin thus fixing a noisy problem on most T’s. This steel pulley has a .002 smaller bore than standard, if your crankshaft is that not worn you can hone this to size with a brake cylinder hone.