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I have had my 2007 GT convertible for about 8 months and after a ton of research and questions to other forum members (thank you for all the advice...this forum rocks!!!) I am installing the Roush M90 this weekend. PCM went to Roush yesterday and so far the installation manual is incredibly detailed and not as difficult as I thought. Can't wait to get it on the road...I will let you know how impressed I am in a few days as well as some pics.
No dyno tune needed with the Roush tune. If you have any install questions, there are several m90 install threads. Its really a simple install, just go slow and it'll come out perfect. Your gonna love it.