I think either saving up and getting beter EngineManagement or upgrading turbo, injectors, intercooler... The STi is fairly potent in the power department already, with a DP and engine management, you should be very satisfied with just that and then move on to suspension work (if you like handling) or just save up and upgrade the turbo...
1990 Civic time-attack project
1990 Toyota Hilux - daily
Last edited by SuBeast; 05-02-2008 at 05:42 PM.
Reason: bcuz i'm cool like that