Heres a "small" mod. Not sure if it qualifies but I think its kind of cool.
Got this small ford emblem out of a focus and superglued it in the indention of the steering wheel.
Other things I thought of are:
-Energy suspension inserts
-spark plug wires (i.e. FMS)
-gauge pod?? It is only about $50, but I guess you need 3 gauges to make it complete. Not sure if this qualifies as a mod by itself.
Btw, shouldnt the throttle body mod say optimize instead of remove?