The 2047 has alot of bottom, i really just wanted to see what the limit was with the 3 port before bottom end was sacraficed to the limit= no bottom at all, and with this conclusion i feel you can run just about any topend pipe on a big or small track and kick arse with the 3 port, the 2050 and 2060 OS pipes have always been some of my prefered pipes, and the 1005 is sick on top, the 2047 is just as good on making power and top end with more bottom but still liner, you can go just about anywhere with a 3 port and 2047 and have enough for anything. Runtimes on the OS and 2047 are very close as well.