I am looking for a good cat-back exhaust system for my 2008 Scion Tc, with a nice deep sound.l do not really know that much about any systems, so l do not really know what to look for.

there are not too many catback systems on the market for the tc, most are axlebacks. but what you should do is go on youtube and look up tc catbacks and then listen to how each one sounds. some sound deeper than others, but its really up to your personal choice. megan, tsudo, greddy to name a few.

1st catback does nothing but make noise. If you want to make noise for whatever reason get what Scion recomends and offers-borla.

l own a Tc and to be honest an after market exhaust in a Tc doest sound very good. It is too loud and 4 bangers does not sound to good. l would go with the least loud. In my concept the TRD is the one that sounds the best and l think you can keep you warranty with the dealer. Borla is also good, but TRD is better.

l have a tc with a trd exhaust. l think it sounds great because its not too loud but it sounds just right and it is covered under warranty which is great. ive heard other tc with really loud annoying exhausts and l always think mine sounds better. i'd go for the trd.

greddy or hks

honestly the trd isint very good, just like the borla. the hks or the greddy r loud & raspy l dont like that. l would recommend the tsudo n1 but they r very hard to find. there r imitations that sound just the same l found some in e-bay they sound very nice.

http://google.com/products?hl=en&client=firefox-a&rls=org.mozilla:en-US:official&hs=SVN&q=scion+tc+jdm++exhaust&um=1&ie=UTF-8&sa=X&oi=product_result_group&resnum=1&ct=title

and if u ever need some headers go with the weapon r 4-2-1 they r mean!!