Well I'm not chasing loads of power but rather a few good upgrades and a retune to suit them.
I have built a 2door WRX from the ground up and followed the international legacy forums closely. It would be a rule of thumb that up pipe, down pipe, intake and intercooler mods with a retune net you some good power and efficiency gains.
So if a WRX cooler won't adapt what NZ options are around for a bigger top mount core to suit the legacys? (I will add an electric fan to ditch the heat soak)