J's Racing
T1r
Tracy

 

Apexi Gt Spec! Although a little bigger than most, it still puts out an incredible sound!

 

See my signature. Not the cheapest but quality nonetheless!

 

Borla - quiet, just louder then stock. Deep smooth sound.

 

Any single 70mm+.

 

amuse r1000

 

Supersprint all the way.

 

amuse r1000, t1r 70mm, asm 70mm, j's racing 70rs, j's racing 60rs, you can't go wrong with any of these

 

greddy ti-c sounds real good, I'm suprised. Figure out what your build is first.

SINGLES:
NA POWER: your going to want to go for a 70mm like ASM, Tracy Sports, Amuse or J's.

Turbo/supercharger: 70mm might be ok but your probably going to want 3 inches, again depending on build.

From there it just depends on price range, and sound/loudness.
If you want quiet make sure you retain your stock cat as well as some sort of resonator or move to a quieter...
dual exhaust: comptech, mugen, fugitsubo, apex, amuse
quiet singles: ASM 60, J's 60, Amuse Titan Extra

Try and listen to cars in person, videos just dont do them justice.

heres my trust ti.
http://www.youtube.com/watch?v=OlzcBTpKoro

 

more of the asm 70mm