its the pipe in my profile pic - I tried to zoom in the attached images
1.) Yama 701 B Pipe Manifold
2.) 650sx headpipe with dry pipe mod (this has been debated to death)
3.) 650sx expansion chamber
4.) cut 3inches off the end of the second chamber and weld to the first, allows you to keep the stock lip for coupler purposes
5.) 550sx Westcoast Cone - although i am sure you could use a stock 650 cone as well, but i wanted one with a water inlet already tapped in.
I am by no means a 2stroke pipe expert, but it seems to be much better than stock yama 701 exhaust and allows me to upgrade to b-pipe in the future if I want.
I had to get a local rim shop to weld it, but if you know how to weld - could make it look factory. 650sx pipes are cheap as everyone seems to upgrade to aftermarket.