I have been in an FBO 1M during a few very aggressive acceleration runs then we switched to my car which at that time didn't have meth or an intercooler to do the same type of runs and we noticed a huge difference in heat soak. The 1M owner had a CPE intercooler I believe. But if you don't want to do any kind of trimming / cutting to fit one in there then ETS 5" is the way to go.
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