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to be fair none of the companies have testing info available of there coolers apart from auto specialists have some stuff on the wed site
GRS, RAD TECH, etc etc are all twin pass u want single pass like pro alloy or auto specialists
I would be interested in seeing the auto specialist data for one of the front mount Escort intercoolers and could not find the data on the site, do you have a link ?
I've just sold one which was purchased to replace my worn and abused GRS twin pass which was refitted after seeing the performance.
Admittedly not everyone runs big boost (see signature for spec) but I do and received noticeably higher ACT temps than I did with the GRS.. my water injection was more seeing far more action with the auto specialist, than I have ever seen with the GRS