Sorry if this sounds like a stupid question but I got to ask.

Can I use a ecu from a wrx to use in a wrx ra???

Both cars are phase 1 and use the earlier 4 plug i believe and engines are same... its not an sti ra!!!

Cheers

Phil

 

yes the ecu will be compatible.

 

Yep. The WRX and WRX RA from any given MY share the same engine. As you elude to, the engine in the STi RA is an STi engine, so different to the WRX/WRX RA one.