Originally Posted by ZOLE

I went with the FI SS CBE + 18" resonators (stock cats). I think it is just about the perfect sound level wherein you can still have conversations in the cabin but it still has enough extra dBs which improves the stock Z exhaust sound (without drastically altering it) nicely. There is no rasp whatsoever, the exhaust note is very smooth.

I am on the fence about upgrading to a HFC because I want maximum performance, but am afraid of being too loud (drony).