lol, i think i am not going to do any exhaust, just way to much $$$, i will go ahead with the x pipe, and try to find some 4.8 exhaust.

I had a Flowmaster on my X5 and it sounded fine. I think a 70 series would be quieter and sound fine. The X5 is part American anyway. :rofl:

any sound clips? i dont want it loud at all, just pleasant sound.

anyone know the inlet outlet size etc of the x pipe, which one is the one i need?

Ekaz's 4.8 sounded amazing, I heard it on his homepage a while back

Description: MagnaFlow Universal Stainless Steel Tru-X Pipe, Part # 10790, 2.25" Inlet / 2.25" Outlet X Pipe

Overall length 305mm, 61.5 outside diameter all pipes, 1.6mm wall thickness - measured by myself.
Please keep in mind when you cut off the Resonator to install the X-Pipe you'll need some more pipes to get it fixed(X-Pipe almost twice shorter than Resonator). Better inform your muffler shop in advance.

PS. My opinion the best for BMW X5 is X-pipe + SuperSprint.