I have Fentons on my 62 c10. I bought the dual in/dual out muffler from Patricks a couple of years ago. I had a local shop install 2" pipes. The muffler is in the same location as the stock muffler. The tail pipes are routed over the axle and straight out the back on either side of the hitch. I love the sound. It's really pretty quiet at idle. It has different tones at different rpms and truly sounds musical. It really starts barking at 3k and sounds bad to the bone above that. And it is DEFINATELY my perception that the truck has more power with this exhaust vs. stock. No dyno needed.
