CSF BMW E8X E9X 135i 335i Z4 Auto RadiatorProduct Details All aluminum construction with a higher capacity 2 row core. For Automatic Transmission vehicles ONLY! CSF is a leader in automotive cooling technology, with over a half century of experience. Using that knowledge, they have developed this high performance radiator that far surpasses the abilities of the stock unit. Starting with a two row, triple pass design for the coolest temperatures possible, this radiator features high quality