Hi just got a 98 's' reg turbo 2000 and its running a bit sluggish its got a cone type filter not sure what make is it worth reverting back to the original box with panel filter ? and another thing can you plug and play another remappable ecu into it say off an sti or wrx without much hassel? cheers

 

Yeah, put the standard air box back on. With regard to the ECU, they aren't mappable on htat age, you would need an ESL duaghterboard for that, but if you can find an ecu from a WRX or STi of the same age it might work, but I would've thought you would need a better fuel pump, turbo and injectors off the same car as a minimum........