Extrude hone is done by dealing with the company themselves, or taking your intake to a speed shop that then in turn ships it to extrude hone, and gets it done for whatever price that they negotiate (discount over what you can get) then they mark it up for a profit, and return it to you. So, you can pay extrude hone directly what they ask, or shop around to several places that do it, and see what they will charge, looking for a better price.
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1993 GT/AOD
'93 Mustang GT