CSF BMW E9X M3 / 335i / E8X 135i Race-Spec Transmission/Oil CoolerCSF offers the best and most advanced Transmission Oil Coolers on the market. Keeping your transmission temps down as you push your M3 335i 135i hard on the street or track. Made with CSF's AC Condenser Technology Using a 1 Row Super High Pressure 22mm Wide 11 Channel Microtube Dual Pass High Performance Core with 11 Cooling Tubes vs. OEM 10 Tube Design High Density Multi Louvered Fin Design with 20% More Surface Area Contact Compared to OEM Unit Drop
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