The factory FT86 radiator is quite good and can support track day use for naturally aspirated builds without any problems. Boosted customers will want to consider a Koyo radiator upgrade.
ALL track driven BRZ, FR-S and 86 absolutely require an oil cooler in order to keep oil temperatures in a safe operating range. Our Perrin oil cooler kit installs easy and provides the additional cooling needed for endless laps of FUN.
You MUST check clearance to AC condenser when installing a new radiator, factory condenser installs not real consistent and you want to make sure nothing will rub a hole in the new radiator, bend consendser brackets for clearance as needed.