What JDM Stig is saying is that many of the OE ECU's fitted to Impreza's offer plenty of capacity for remapping without going standalone. And that includes the ECU you have fitted to your JDM Bug STI.
Standalones are simply OTT (benefit vs cost) for the majority of tuned Imprezas.
Do a search for Open Source Impreza Mapping, especially about ROMRAIDER and ECUExplorer, and you should be able to dig out all the information you need.
Last edited by Prasius; 18 May 2009 at 01:50 PM.