cheetha94607

i'm currently installing my afr 165 heads. the problem is the accesory brackets hole are 9/16 and my heads accesory bracket holes is 5/8. have anyone installed afr heads before, if so please let me know what you did A.S.A.P.

89Ford

dude drill them out

5spd GT

AFR heads have the same size "thermactor" and "accessory" holes as a stock cylinder head.

OnyxCobra

The heads are not side specific but in the end of each head there is a plug that allows the accessory bracket to screw in. If it wont screw in chances are the plug is in the back side of the head, which will block the EGR from functioning. The plugs just thread in so unscrew them and screw them into the front holes of the heads.

deadcarnahans

ONYCOB is correct...

OneFine89Mustang

agreed

r.barn

you can go buy those "thermoatic" ,or however you say it, plugs too. I have in the past.

Jon82387

yea when i did mine i just drilled the hole out bigger so the bolt would fit it, and i plugged my thermactor holes so it didnt matter to me

mjr46

you should not have to drill a dang thing!!!!! purchase the thermactor plugs

OnyxCobra

you did it the wrong way. The hole the accessory bracket bolts into is smaller, if anything the hole should be too big and the plug makes it smaller.