Well I had to replace the 7cm gasket and o2 gasket the other day cause my stocker were gettin pretty bad. I decided to port my 2G manifold while I was at it. Ive never really noticed how restrictive the casting was on this thing til I went at it!!
though soon to be gone.......
If you plan on doing this your self I would suggest that you have a good assortment of dremel bits at hand. I found that if you triple up the cutting discs on the bit with the screw on top you can take the most off per cost of the bit. I also noticed that the casting in the 2G manifold is WAY stronger than the 1G. I spent @ 3hours porting with the dremel ( I was bored anyways)
All in all, throttle response is better and the turbo spools a bit quicker. I would recomend doing this mod either by yourself or have someone do it for you with the proper tools.