i didnt. Turns out its still cheaper to get it made. added benefits of warranty etc.. 
 
Ill eventually get a better exhaust system but it should be better than stock as it is now anyway.

also for headers.
 
http://www.hurricaneheaders.com.au/hurricane/products_main.php?txt1=Headers%20/%20Manifolds%3Cbr%3E/%20Turbo%20Exhausts&txt2=Headers%20/%20Extractors&txt3=TOYOTA&txt4=CELICA%20&txt5=4%20CYL&lvl1=1&lvl2=5&lvl3=29&lvl4=168&lvl5=1684#
 
&
http://www.bestmufflers.com/bshop/product_info.php?cPath=552_554&products_id=2728&osCsid=da17dea9fdc731f7b518f2d9f7f1f8ec
 
these would both fit the bolt pattern on the head side. but not the part that connects below right? Any exhaust shop should be able to modify it to fit?

Does the 5sfe head have the same ports as the 3sge?
The stock headers are a fairly good design anyway and those headers may be no better than what you have now, and they are designed for a different motor anyway.
 
I have Fujitsubo headers that are custom designed for the gen2 3sge and they really do make a difference to my stock motor.
I couldn't say how they would work on a motor with high lift cams, but they should be very good because they have very well designed even length primary pipes, and larger diam compared to the stock headers.
You can see that the no 4 pipe crosses over instead of the no 1.
Also gives a lot more clearance for the oil filter (fit larger filter), great if you have a sandwich plate.

those genie headers werent going to fit either.. im going to have to get it all custom made from engine back. 

it was from a gen1 3sge. But the bends in the pipe would interfere with my engine mount and it comes down to sharp, close to the block. If that makes sence.
 
The bolt patern to the head was exactly the same though, but the bottom part was not.