Decided i wanted more power, so i put back on my 3" muffler that i have had since i got the turbo conversion done. Always planned to put it back on, but intended to get the exhaust control valve welded in and the Mazdaspeed exhaust tip put onto the 3" muffler as well...but, eh, priorities! Easily freed up another 5-10kw atw. And at least i have a decent (oval) exhaust tip again.
Comparo for size: 2" vs 3"