toyota corolla 2.2

Good Morning, been a few years sense I've been on here.. looking for some information.
1999 Toyota corolla, automatic
Who sells engine upgrades? cam, heads, race builds?
info, if there is a bigger engine swap available?
what if any interchangeable heads for better performance?
fuel injection up grades.
Stock appearing class.. what you do under the covers is up to you.
suggestions on, and where to purchase up grades for springs and struts.

Thanks
Everfaster

51 looks, no one running toyota's anymore? Just fords must be. still looking..