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Head Studs
The combustion inside the engine pushes the head and the block away from eachother. As you make more power, increased cylinder pressure pushes the head and block away from eachother harder and harder. Head Studs hold the block and the head together. The more power the engine makes, the stronger the head studs need to be to keep them held together. If the head studs stretch, it could lead to a head gasket failure or worse.
If you want to learn more about how fastener attributes influence head stud selection, click here to watch the Head Studs section of Jay's Bottom End Buyer's Guide...
- Good: 8740 Chrome Moly
- Better: ARP 2000
- Best: Custom Age 625+, H11, L19