To see the answer to a particular question, please click on the question and the answer will appear below the list.

1. Does the chamfer on the washer go up or down?

2. Do I need head bolts or studs for my engine?

3. Do the head studs only go in hand tight?

4. Do the lines on the nut go up or down?

5. Why are my “new” head studs leaking water and how do I stop the leak?

6. Are the head bolt kits (or head stud kits) for one head or both heads?

7. Can you use loc-tite or any thread locker instead of ARP Assembly Lube?

8. Is ARP’s torque recommendation the same as the vehicle manufacturer specifications?

9. What drill size do I need for my wheel studs?

10. The catalog says “U/CUT” Studs.  Do I have to cut the studs?


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“ARP”, the ARP logo, Wave-Loc, Perma-Loc, ARP2000 and ARP3.5 are registered trademarks of Automotive Racing Products, Inc.
All other trademarks are property of their respective owners.