You say you don't want anything wild?
Then I can only assume you don't wanna pierce the injection pump wire. Which are the 100+hp boxes.
Therefore you don't want to look at Edge Comp, Bluechip Fuel Managemnet System, JVD torque enhancer, TST PowerMax³.
You need to look at Edge EZ, Van Achen, and any of the other "minor" plug in boxes..... there are several variations out there.