Had a shop install a single in/dual out 50 series FM with ractive SS exhaust tips. Looks excellent and sounds downright nasty. I thought it would be too loud. To me, it's perfect. Sounds fairly stock at idle. Give it gas and all hell breaks loose. Mine was the first Titan that the exhaust shop did the install on and the owner was impressed. He owns a Toyota Tundra and admitted he was a bit jealous. Anyone comtemplating the FM 50 should have no fear.