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Originally Posted by 986Porsche986
I got rid of the stock muffler and put on a top speed muffler.
http://www.topspeedauto.com/ProductCart/pc/viewPrd.asp?idcategory=0&idproduct=1781
I really like the sound and that the top speed muffler is lighter and it doesn't turn my rear trunk into an oven. However, It seems to me that the car did lose some hp. I am going to run my iphone application "dynolicious" on the two mufflers and check my suspicions sometime in the next few months.
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Just curious, How is an Iphone going to tell you the difference in HP between the two mufflers??