New down pipe install - 25k miles

So I've finally decided to get the MAP down pipe, intake, and their Stage 2 map. My 2016 WRX has 25k miles on it now, and has been through two Illinois winters (salt and all that other good stuff). So besides using some PB Blaster the night before, and a few hours before on the turbo bolts/studs, is there any other advice and/or tips from anyone out there that has went through this?

I also heard that having a torch on hand, may also be a good idea.

And I did order the Grimmspeed J-pipe hardware kit, just in case.