Get yourself a good FMIC, larger than you think you need, a catless DP, and start with the MHD 1+ and go from there. I'd also recommend a high flow panel filter at the very least, if not the BMS N55 intake or similar. The idea here is to relieve as much stress on the turbo as possible. With a N55 you won't have too much trouble getting to 400 crank, but 400whp will be unobtainable without a good bit of work.
Do you have access to E85? A bit of ethanol in the tank without pushing significantly higher boost will help things along timing wise especially in socal heat. I run about 50% mix all summer here.
Get it all set up, and run a couple logs and let's take a look and see how your car likes the low boost MHD maps.
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