I have the OS speed, I also ran the 2058 on it, didn't want to pay extra for a pipe, but I borrowed one for testing, they all say the OS pipe is smoother and had more top, I found it different, the 2058 seemed better on the bottom and on the top, maybe I am used to that pipe since I have ran it for about a year, but I liked it better, and with that in mind I do break loose a bit a times, that is why I went with the 2096 to give it a try and it seems a bit soft on the bottom but still all the power I need, just less traction issues with that pipe. So if I were going to buy a b5 or a b2 I would buy the b2 and a 2096 instead of the b5 and a 2058 nvision pipe. I loved the 2096 with my B2, the b2 has so much grunt on bottom and the 2096 made it feel like a speed on top, and my b2 NEVER felt like a speed demon with the 2058 on top end. Here is a link of my B2 with the 2096 pipe check it out

http://www.clbmodify.com/thread-8865.html

BTW the green car has a NEW OS speed with the matching pipe, that engine should make the B2 look slow, but you be the judge of how well the 2096 novarossi pipe works with the B2