Cylinder head washer, Heavy Duty extra thick item, for Cast Iron or Alperform Alloy Heads,

as used in our workshop & on our race winning engines

Helps with evening out clamp loads rather than in one concentrated area directly under the nut.

The STD DB2 & DB2/4 head washer is unable to put sufficient clamping loads on the head & folds around the nut leaving you with a head gasket failure.