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