The only downside i can see is that you are adding a lot of weight to the car, thus making it slower and heavier. As i have dynomated quite a few cars in the past, i definitely will not be doing it to the Boxster. I do not find the in cabin noise that terrible for a convertible. My mom drives an eclipse convertible, and that is a noisy vehicle!
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Lov'n my boxster!
2013 Lexus IS350awd
2007 Toyota FJ Cruiser
2004 Porsche Boxster S
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