Read somewhere someone used "minyak cap kapak" to remove residue left behind after removing the car emblem. If that doesn't work then I'm quite certain Goo Gone would do the trick.
Software is as cardinal as hardware in squeezing out power from a modern engine these days. Just plug in a laptop, reflash the ECU with a new ignition and fueling...
Here's an option for extra car cooling benefits for your mr2s.
Works great to force more air in thru the side intakes.
Cooler engine bay = more reliable engine and more power...