I have been doing a whole lot of searches trying to find a cat back for my 6th gen and I can't seem to find anything that doesn't sound riced out.

get yourself some headers a high flow cat a good resonator and a muffler of your preference go to shop tell em to intall with new 2.5" piping and depending on what u pick it should be good if you are hearing "riced" out exhaust it because its probably just a straight pipe and a crap muffler on with no resonator

riced out? i know what rice/ricer/riced is but what sort of noise do you mean sounds "riced out"?

for the 3S-GE there are;
HKS Silent Hi-Power
Blitz REALIZE TT-R
Mongoose
Blue Flame

I've heard that the Fukimoto racing exhaust sounds pretty nice, I'm not completely sure if it's a catback though. I think the Megan N1 is a catback but I've never heard it. I know for sure that the GReddy SP2 is a catback and it sounds great because I own one. (very low and subtle idle tone, great for subtlety, won't explode your eardrums when you go WOT)

Go check the official exhaust thread. Use the search function to find it.

tanabe gold medallion+++++++ sounds soooo good

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This, but they don't make one for our celicas, only 7th gens.

Although, I'm not sure if they're selling the piping along with it or what. But I love the way those sound.

http://www.youtube.com/watch?v=nDZKpVxnL8U <-This is the 2.0T I4 btw, I love it.

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I've got the Megan N1 muffler currently on my car, I even got an exhaust video posted in the multimedia section so you can see for yourself. I have a high flow cat and resonator also installed on it because it does help alot on getting a good tone from the exhaust. In the future though im going to install a Tsudo SP style muffler because it's the closest I could get to the Greddy SP series catback that I could find online.

i have an hks silent catback on gtfour and has a nice deep idle sound. and has a smooth sound at high rpm. loud but not too loud