Tune needed?
Do you need a tune for HFC's and a Cat-back? How "adaptive" are these cars? I know the factory tune is conservative (as are all factory tunes), but does HFC+Catback throw the tune off, or do people get tunes just to raise the rev-limiter and get a few extra horsepower by being a tad less conservative than OEM?
Any A/F included dyno's of a car with HFC/Catback and no tune?
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