This popped up on Google, not sure the source or what the EP Catalog is but a place to start.
Many years ago, it was worked out that the
4AGE 16v headstud kit
can be used with the
4EFTE with some machine work to accept them. As it has become quite a common fastner upgrade when putting a motor together, it has since been listed as
4EFTE fastners in the EP parts sections of the sellers.Jun 13, 2013
ARP Head Studs now available??? | Toyota GT Turbo