Not even cat back. Up to the diff, the sedan fits. I'm running FG sedan cat to diff section. Running FG as I'm running FG manifold, turbo, dump elbow, dump, cat etc 140km is nothing Snowflakes will fresh up its appearance. But beware the rears will look tubbed as a result haha. Big guards. Good idea re: trans cooler, put a fan on it if you can. I think the calipers mount differently from BF to FG so try to find some BF 322mm fronts Honestly you don't need to worry so much about the car surviving. They are tanks (touch wood), mine keeps going fine and I have zero concerns about it. Note I do treat it with respect and stuff, just no love. My advice, as cool as doing FG intake/exhaust manifolds are, it would have been far easier, quicker and cheaper keeping it B series spec turbo install Good luck