Which Tuner
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head studs replace the stock head bolts. they thread completely into the head bolt hole and are made of a much stronger alloy of metal than the stock head bolts. they don't stretch like stock head bolts do and allow for much better and even clamping force of the head to the block. therefore eliminating heads from lifting and head gasket failures due to bolts stretching and causing the head tq to not be up to spec.
hope this helps you understand it a little better
hope this helps you understand it a little better