CSF High Performance Bar&plate intercooler core 25x12x4.5 Forced Induction>Boost Controllers CSF recommends upgrading the main

CSF recommends upgrading the main water radiator (CSF-7084)

M3 2018-2016

RS3 2020-2017

including individual pressure testing

For instance

CSF High Performance Bar&plate intercooler core 25x12x4.5 Forced Induction>Boost Controllers CSF recommends upgrading the mainCSF intercooler cores are the world's best intercooler cores for fabrication of custom intercoolers. They offer intercooler cores in many different styles and sizes including cross flow, vertical flow, the 6 in. wide Magnum Series, and ultra efficient liquid to air (water to air) cores rated for up to 2000 horsepower. High Performance Bar&plate intercooler core 25x12x4. 5