I need opinion about this because I'm going with a different setup next year (mild street ported 6 port hx52 turbo) even the outlet of my hx52 is 3.5 inch, i'm really debating weather i go full 3.5 inch exhaust or just go 3.5 to 3 inch back into my RB exhaust what you guys think. Is mainly a street car but I don't want to choke the power ethier. Thanks

 

3.5" bends aren't always easy to come by and can be expensive. If you're going to bother doing a full exhaust I would stick a full 4" on it. Whether it's worth the effort will depend on how much boost you want to run.