CSF 08-21 Subaru WRX/STI 2-Row 42mm Race-Spec All Aluminum Radiator - BlackBrand CSF Part Number 7095B Category Cooling Radiators Condition Brand New Original Manufacturer Packaging CSF has over 5 decades of experience manufacturing radiators. So when it comes to keeping your engine cool and your WRX STI running at its best, a CSF High Performance All Aluminum Radiator is the obvious choice. Designed to perform on the street or at the track, a performance radiator is a must have for both high horsepower builds as well as