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I just brought home a new/used horn ring last night and looked at the 3 bolts that hold it on and cant see what they are. are they an allen bolt? if so what size? they kinda look like a square. any help? thanks
 

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I don't know what they are called. They are not allen, not star, not torx, not one-way. I use a small common screw driver to remove/install. Once you have them out, you can replace with what ever you want head design you want. I think the original design was to assure these were not over-tightened.
 

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They are clutch drive screws and there are special screwdrivers for them. Holley used to use clutch drive screws on float bowls.If you have a good fitting flat blade screwdriver it'll work,
 

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They are clutch drive screws and there are special screwdrivers for them. Holley used to use clutch drive screws on float bowls.If you have a good fitting flat blade screwdriver it'll work,
Thanks for the help guys. i got them out and got the new ring on.
 
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