So, I bought a flowmaster muffler and I dont know if its just me, but there is no model number, no way to distinguish what muffle I actually have. Its not on the box, its not on the muffler itself, and its not the paperwork and catalog it came with. Please, assure me im missing something.

 

assuming you got it from an auto parts store its probably a 40 series.

If its black its a super 44, but idk if you can get those at auto parts stores.

 

how Does this happen?

 

eBay or Craigslist