Have exhaust news, probably do just as well continuing this thread than starting another.
As you know i have the Fujitsubo 3" cat back. Today i had a 3" dump pipe and 3" cat installed. direct bolt on from an R33 dump, so easy to find the part.
What i did find out, i have a 2.5" dump and 2.5" cat coming off the car. neither of these are stock either, so depending on the condition of these pipes i'll probably let them go real cheap if anyone wants a mild exhaust upgrade. i'll find out tonight when i pick the car up and post again if they're worth selling. my exhaust was super quiet, could hear the shocks over the exhaust, so they did their job