Where/What brand could i get a Good Catback exhaust? I was looking at the Greddy Ti-C racing exhaust but it says it requires bumber mods, so i don't know if i want to go with it.

 

I bought the SR*S ebay exhaust for 215 from nissangtr "off the books" by sending directly through paypal. I am happy with it, but I was required to use a long pipe over 2 of the exhaust hanger mounts and bend them 1/4" to 1/2" to keep the thing from hitting the bumper. If I had to do it all over again, I might get magnaflow catback since it sounds very "clean". Greddy Ti-C is going to be a little louder, not as clean as the magnaflow.

You want sound? performance? going turbo? If you want performance....save your money, it's not going to give you much extra performance.