Flowmaster 717857 Flowmaster Flo... vs BoardRoad Exhaust Muffler System...

It is certainly a lot louder than i was expecting. On flow masters sound scale it is in the upper 50% of their muffler line up on the sound side. Sound is deep and only slight noticeable in the cab at idle.

Their is way too much drone in the cab. The trade off for cab comfort is not worth it.

It has some drone at 1000rpm, which my runaround the neighborhood speed. But not at all objectionable. Duel exhaust muffler and better air flow.

Has to cut 1in off my pipe to make the hangers line up. The diameter of the pipe is way too large for the factory exhaust and does not seat properly leaving a slight gap and exhaust leak.