CSF Racing Front Mount Triple-Pass Heat Exchanger w/ Rock GuardBMW F3X F2X B58 B48 Triple Pass Heat Exchanger w Rock Guard Silver As the 3. 0 Liter B58B30M0 (1st gen B58) turbo engine platform continues to be developed by the high performance industry and more power is extracted from the engine, CSF's high performance heat exchanger for the BMW B58 engine will be a critical component to keeping the vehicle charge air cool, and out of limp mode. The CSF BMW B58 upgraded heat exchanger for F series vehicles will be