FYI, I have a 2016 228i M-Sport convertible with the N26 SULEV engine. My wife and I have driven this car on long trips (300+ miles) including up and down mountainous terrain (~5000+ ft.) with no "heat soak" issues. A larger intercooler for this engine would be a waste of money, as it won't buy you anything unless you're going to do a lot of track days, and even then it would be of marginal help.
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2015 F80 ///M3 Sedan 7DCT Tanzanite, 2022 X3 sDrive30i 8AT Brooklyn Grey
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