Someone said the coupe or 05/06 sedan midpipe with the stock 03/04 muffler sounds great. There were sound clips also; I'll try to find them.

Edit:

I found them, It was DaveB; here is the link:

https://g35driver.com/forums/g35-sedan-v35-2003-06/164089-some-vids-my-03-sedan-jdm-tails-06-midpipe.html

 

is Greddy Evo2 better than the combination of HKS sports + coupe midpipe??
performance and sound wise....

 

I am very happy with my HKS muffler.

After adding a Z-Tube and stillen intake (same things as the popcharger), it sounds great. About close to a stock 'coupe' exhaust except a little better IMO!

 

i already have mai K&N air filter & stillen z-tube install in mai car...can I still put a stillen intake???
since stillen z-tube combo + HKS Sports seems 2 be a good combination!

 

here is a sound clip with z tube, K&n filter, 5/16 spacer, and hks rear section. since the clip i added the stillen but i havent done a sound clip yet.

 

I have an X so I didn't have much of a choice, but I think I would have bought the same exhaust either way.

I bought the Gen 2 Stillen.. Its plently loud. It has a nice sound when you are easy on it and really comes alive when you get on it. I wouldnt want the gen1.. it would be too loud.

Here is the Stillen gen2 on my G35x: