Have for sale used 3.5in cat back system. Mild steel, went to stanless so just sitting in my shed. Good condition off my gtr r32 should fit gtst. Local pickup only, my location is the west side of Adelaide.
The profile is the percentage of the width. eg 265/30/19 my car. 30% of 265mm is your wall height. This is why the profile gets smaller the wider you go. This is my understanding, i could be wrong.
Did a bare metal on mine about a year ago just not with the engine out. Have a few pics of the assembly in the gallery. The biggest shock i got was the body rubbers, all up cost me 2gs but easy to get from nissan. Took me about 3-4 days to put back together. Have fun mate its worth it.
I am probably going to start job in the next week or so. I feel alot more confident thanks everyone. I will make my own lines and i can get hold of some heat sleve stuff. One last thing, is it a big deal to adjust the actuators once the turbos are in? Im going to leave the engine in the car.