Keith Mopar, kudos to you on your home-made system. Looks like a package deal! You should go into the buisness! lol! The black turndown looks SICK!!
I would go with 3" as well. I think 3" is the norm for anything turbo.
Thanks. My stock exhaust was 2.5 leaving the motor, but before it got to the muffler they had it down to 1 3/4 . ( comparison pic)
I built the exhaust when the car was on my hoist, so if you were doing the work with a car on jack stands it could be done just a little slower.
Backtobasics, your system will probably look a little better than mine when you get it back, it sure does make a nice looking peice. I painted mine with hi heat paint to try and presurve it. My car dosn't have many miles on it but it still looks good.