Originally Posted by hellaGT
Even with just the OEM wrx axle-back on a N/A?
Yes. I used to run a GDB STi exhaust on a GF wagon with EJ253 swap. It was quite a bit louder than on the donor car. Sounded good, not raspy or anything, but louder than the STi.
I've seen a few GH8 CBEs on 5dr 2.5i Imprezas. The owners say they are louder than stock.
The turbine does a really good job of chopping up sound waves and because of that, the muffler can be less restrictive.