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It's not going to bounce off the limiter unless you are going wot. Don't go wot until you get it tuned.
It is not anything like putting a cam in without a tune.. More like headers and an intake.
Break in for my yank was 150miles NO WOT.
260 for install of a tc is cheap...if thats what they will really charge you for a good honest install. After doing it myself I wouldnt trust anyone to make sure the measurements are correct.