I don't know the specifics of your situation so I can't speak to it. However, I have never had any problems with MAC. They have always stood behind their work and made sure everything was addressed if I had any problems that cropped up later.
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2008 G37s 5AT, Stillen SC, Stillen CBE, Stillen tranny cooler, DBA 5000 front/4000 rear, Stillen sways, Tein SS-P coilovers, SPC front & rear control arms, Goodridge lines
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