JB in particular,have a read of this thread on toyota nation... these camry owners are reporting an instant hike in performance just turning the AFM cog a few teeth and adjsting the timing a few degrees....

http://www.toyotanation.com/forum/t82158.html

This seems to be a free mod without the use of a piggyback! im definately going to try it.

For info this wont work for you 3s-gte or 1mz chaps,its for OBD1 compliant engines only. :P