7/16" - 1/2" head bolt bushings w/ AFR165's

Discussion in 'Fox 5.0 Mustang Tech' started by rockin_rick, Jan 12, 2004.

  1. Are AFR165's (#1402) drilled for 1/2" head bolts, and if so, do they need a bushing/spacer for the 7/16" bolts that I will be using?

  2. If the heads have 1/2 holes they will need the spacers or stepped bolts. ARP makes them.
  3. That's what I thought, but I asked the guy on the phone at the place I bought them from told me that they were 1/2", but as long as the dowels on the deck were new or in good condition, that they be enough to locate the head and 7/16" bolts would work. That doesn't seem like a good idea to me, but I'm not really sure. I'd feel better with some bushings or the stepped bolts, but since I've already got my ARP 7/16" bolts, I'd need a bushing.

    I just don't know if the heads are drilled for 1/2" or not. Does anyone know if they are 7/16" or 1/2". AFR's website makes it kinda seem that they are drilled to 7/16", but it doesn't clearly say which. If you have 165's, what did you use?

  4. Does anyone know if AFR165's are drilled for 7/16" head bolts/studs, or are they drilled for 1/2" bolts/studs?

  5. AFR 165s are 7/16. the 185s are 1/2
  6. Running a head made for a 1/2" hole with a 7/16" stud or bolt will leqd to head gasket issues eventually.

    If anyone needs the bushings/washers I have a brand new set from ARP that I didn't need for a customers car and I will sell them cheaper then you can buy them. [email protected]
  7. RICK91GT---- Do the bushings just sit on the top of the head and go down on the hole just a little or are they the full length of the hole?
  8. Yes exactly......

    The bushing takes place of the washer, and has a small lip that goes in the 1/2" head hole.
  9. Ok...I am working on the money. I am also buying torque boxes today or tommorow so I will see what happens. I will get them in the next few days.MAybe sooner.

  10. TQ box supports from me?
  11. No why do you have them?
  12. See it in my sig.... :D

    I sent you a PM....
  13. I think I am going blind in one eye...maybe both. hehhehe