Hi
all I like to now how many cats on hawk eye wrx sti as I have one and I would like to put centre pipe on it as i am looking for bit more power but I have ppp on it would it be ok to run it with the ppp could it cause over boost and would I have to get it remaped or could it run just fine also with a ninja2 back box oh running at 320 . THANK AND CHEERS.