V-Flow and TUBI exhaust
I have the tubi exhaust installed a while ago and i can't feel any gain out of it, but after I installed the V-flow, I noticed a gain in power. The sound of the exhaust also changed to a more aggressive and throaty sound. I LOVE IT!!! 
I cannot help myself from not speeding because the car just sounds awesome at high rev. I can hear the car BREATH better. I asked the tech at porsche why would the V-Flow allow me to feel more power and he said that the TUBI exhaust that i put on earlier is probably not working in its full potential because exhaust is for shooting out air and that the TUBI exhaust allow the car to shoot even more air out, but at the same time, the car is not sucking in enough air before i install the V-Flow to accommodate the exhaust. He said that I am feeling the difference because my car now is able to suck in more air and at the same time shoot more air out. I don't know if i am making any sense but the main point is that V-Flow ROCKS!!!! I highly recommand it! 
I cannot help myself from not speeding because the car just sounds awesome at high rev. I can hear the car BREATH better. I asked the tech at porsche why would the V-Flow allow me to feel more power and he said that the TUBI exhaust that i put on earlier is probably not working in its full potential because exhaust is for shooting out air and that the TUBI exhaust allow the car to shoot even more air out, but at the same time, the car is not sucking in enough air before i install the V-Flow to accommodate the exhaust. He said that I am feeling the difference because my car now is able to suck in more air and at the same time shoot more air out. I don't know if i am making any sense but the main point is that V-Flow ROCKS!!!! I highly recommand it!
When you are not on it, it is not too loud, but when you are on it, it sound like a SUPER CAR!!! Actally, I have never heard my exhaust from an outsider perspective until last Sunday, and when reaction is: "DAMN IT SOUNDED GOOD" 
Oh well, I am happy with mine now and I hope that these info that i provide will allow you to make the right choice. Also, the Tubi sounds even better when the rpm is above 4000. I can describe no further as to how my car sound from the inside and outside because you must hear it in order to understand it. 
