We have cylinder head bolts (as well as all types of engine fasteners) for gas and diesel engines.
Automotive, truck, industrial and inboard marine engine applications.
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Freeze / core / frost plug kit brass for chevy inline six 235 and 261
for block only
, freeze that go into coolant jacket are brass, threaded oil galley , cam plug and other oil galley plugs are steel
# fpk-103b