bannana mufflers

Does anyone have dyno experience with porsche bannana mufflers. I am putting a 3.6 enginge (300+hp) in my car and I would like to know the porsche type muffler with the least back pressure & the highest flow. It would seem to me that a muffler for a 3.6 engine would have a higher flow than one for a 2.7 engine even though they might look the same. I would'nt mind a so called sport muffler such as a dansk but I don't know if they actually flow more or if they just sound sporty. Any advice or experience out there?
Thanks
don

Hey Don, I don't know what induction system your using but if your not putting on carbs increasing flow doesn't necessarilly add horsepower to a motronic setup. The opposite can actually happen. I'm no expert on this but you should diffenently research this thoroughly. I haven't read the latest 911 Performance Handbook (Bruce Anderson) I have the 1st edition that doesn't cover your motor but I would think the latest edition would cover it. Bobby