Front mount is wank with a stock engine & stock
ecu.
Version V
ecu's aren't 'Sti chipped'
99 engine & harnesses will require 99-00
ecu either a stock wrx one or a version 5 or 6 sti one.
You can't mix and match stock
ecu's beyond common year for year models.
If your motor is an Sti ej207 the inlet manifold will be red.
all 99/00 wrx/sti had yellow top 440cc injectors.