No upgrades needed to fuel system if you are not doing an extreme build or planning to run E85 fuel. You will need to run 93 gas to get the most of the best tune though. No issues with longevity if you stick with established tuners like Unleashed & LME. LET is another option.
New plugs should be a requirement with a tune, gapped at 0.028/0.030. Ask Torrie what he wants you to set it to, if the plugs are not pre-gapped. Checking turbo piping to make sure all the clamps are secure is a good idea, as boost levels will be turned up. If you "lose power", a hose that has blown off due to loose/no clamp may very well be the culprit.
Are you getting the 3 bar MAP tune? If so, install the sensor first, then the tune.