Here is some data for you guys on an M6 w/o meth.
Comparison between the CSF Radiators x Pure Turbos M5/M6 charge coolers vs. OEM
abut 20 degree F drop in temps, in about 10 degree F hotter ambient temps once the coolers were swapped on.
This is without meth
Thanks to our friends
Evolve Automotive for the feedback on their testing!