CSF Porsche 964 / 993 OEM+ Performance A/C EvaporatorCSF has decades of experience designing and manufacturing A C Condensers and has leveraged that knowledge to design its first high performance Evaporator. Most factory A C evaporators from the 80s and 90s are now outdated in both design and materials. They were originally designed for R12 refrigerant, which offered far superior performance compared to today's more environmentally friendly R134a. Even brand new OEM evaporators are not efficient enough