my truck came with the the trd dual exhaust 2005 4.7, its quiet, quieter than a factory american truck, very quiet idle, it might get a little louder as you rev it up, but really nothing to mention, no drone, the biggest advantage over stock is the dual exhaust look, I WOULD NOT BUY THIS EXHAUST, but if your truck comes with it i probably wouldn't buy another exhaust unless you want more rumble, you do get like 5hp or something over stock, so if you want more power, a clean dual exhaust look, and very very minimal sound increase, you cant get a better exhaust.......
I really liked the look of the TRD dual exhaust, more so than any aftermarket company, and i wanted to keep the added power of the exhaust, but i want more sound, so i went to a quality muffler shop, had the res and the muffler cut out and replaced with the flowmaster 40, i kept the TRD size piping, in my opinion perfect, GREAT SOUND, little to no drone on the highway, deep rumble at idle, no loss in hp or low end torque, looks like a TRD DUAL EXHAUST but sounds like a beast
