Custom made 3 inch with HKS Carbon Ti muffler, Y-pipe and test pipes with some headers.

 

ok.. so ifyou want loud..
get cutouts..
stock when it needs to be then an electronic solenoid will just dump the exhaust out to the ground

 

I went to NOPI car show in ATL in 2005 and I can tell you that the RS-R 350Z with that RS-R GT-II exhaust is the loudest exhaust I've ever heard on a Z period. I mean to the point you would probably want to have some ear plugs in your ear if you full throttle that thing all the time. It was awesome loud but on the streets it would be too much. I can admit my exhaust combo I have now is loud. I think it's almost too much but not quite and I get alot of good comments on it.

 

I though nvidia was loud until I heard an APS 3". Yikes.