Nothing is set in stone so dont hold your breath as far as the exhaust goes. The amount of time testing/r&d, etc will reflect on how much our exhaust would cost. With that in mind, we have to see where the market is and where its heading. So........we are just playing with the idea and trying different things to see how it works. The stock exhaust is not restrictive by any means and its VERY hard to improve on the design, performance wise, on that stock muffler. The stock muffler is basically a straight pipe split into two at the muffler. If you look inside, you can see it. For the first sec 3 prototype, we went with a single pipe muffler delete. Below is the z4 with our sky/porsche 911tt exhaust tip.
