Originally Posted by xDRAN0x
If it can help...
When I had my 07 WRX, I swapped the stock exhaust for an 04 STI exhaust, it did change the sound nicey. I gave my stock exhaust to my brother's 06 2.5 and it also gave it a different sound.
Both fitted perfectly.
That's because for 02-07's nearly ANYTHING was interchangeable. Sadly the 08+'s are not nearly the same.