The kit comes with an oil cooler included, but on 91 octane and 8lbs of boost it almost doesn't need it. I haven't taken it to the track yet, but so far during spirited driving on mountain roads it hasn't even gotten as hot as it used to without the turbos. Gets hotter in stop & go uphill traffic, heh.
You could increase the boost for the track or outside CA, but you would need to run E85 to reduce knock or disable the knock sensor in the tune (not recommended for engine health). Then the oil would probably get hotter, but probably still manageable.
Turbo lag is minimal with this kit. They're R35 GTR Turbos, so they're designed for a very similar engine and sit very close to the headers. And of course, two smaller turbos spool faster than a single large one.
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