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I haven't tracked my 135i yet, but I did buy it with that intent... I have full bolt ons, 5" VRSF intercooler + BMS oil cooler valve... that valve made a huge difference in my operating temperature. MHD also has a cooling profile you can adjust, I had to revert my cooling profile back to stock after I changed the oil cooler valve, otherwise I had a hard time getting above 85c for oil temps. I think with a little preparedness the N55 which runs relatively hot will perform amicably for light track use.
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