Pedro Sport Exhaust mod on a Top Speed Muffler??

[986Porsche986]

So after putting on the Top Speed catback muffler on my 2002 S, and driving it for several weeks now, I am still convinced that I have lost some power compared to the stock muffler. I am by all means not an exhaust expert but it seems like there is too much back pressure and the exhaust is not flowing out as fast as it should. Would it be possible to do the Pedro Sport Exhaust mod on the top speed muffler to increase the exhaust flow without screwing anything up? I would really like to keep the Top Speed because of its lighter weight and because my trunk is no longer an oven. I like how it sounds now, but I would love a more aggressive sound that the Pedro Sport Exhaust mod would bring. So if you guys could give me some input and let me know your thoughts I would greatly appreciate it!

Thanks

Mark