You`d have to hear it yourself in person to truly be impressed but there is a huge sound difference over stock with any of the exhausts.
You need to check out some sound clips to see what kind of sound you`d be happy with if you can`t locate any trucks w/exhausts, every muffler/pipe setup has a little different sound to it.
I wanted a low growl but not a lot of noise in the cab on long trips so I went with a Flowmaster Delta Flow 50 single in/dual out and dumped the pipes out the sides. I love the way it sounds, didn`t lose any noticable low end torque and am very happy with the performance at mid range and top end.
Here`s a sound clip, it`s more accurate if you have a sub on your computer but you`ll get the idea.
I have to disagree with you JD, I had a K&N drop in at the time of the video and an AFE Magnum Force Stage 1 after that, now I`m running the TRD intake and I can say from experience they do not all sound or perform almost exactly the same. The TRD is by far the best of the ones I`ve tried I noticed the difference immediately.
The only reason I didn`t go with the URD is because of the exposed location of the filter. I know no one has had a problem with it and I could build a shield for it if I wanted to but I am really impressed with the TRD.
If you can swing it, save up the money and get it.
I couldn`t justify the price at first but after running it for several months now I can honestly say it was worth it imo, I`m so happy with my trucks performance I don`t even think I`m going to do the MAF calibrator now..........but that could change