Do your research. A lot of mufflers will add a drone. Solo mach 44 muffler is the only muffler replacement that I've read about that will give you some extra sound and zero drone. Corsa makes a catback thats zero drone too but very expensive & some say it makes your truck sound like a sports car. There are a number of others that some say are drone free, some say they aren't. The Solo is the only one I'm aware of that everyone says is drone free. More expensive but if I had bought one in hindsight it would have been cheaper than also adding another resonator this year to try to fix my drone from a magnaflow 22" (that some had said was drone free. Not for me). And while better, I still have a bit of drone 550 canadian dollars later. I would have been in for 350 to 400 if I had bought the damn Solo!
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