I have a 04 700 efi sportsman i would like to make it quieter it was suggested that i try the sleath muffler that goes on after the stock exhaust or replace the stock muffler with a car muffler . I would like to know if anyone is using a car muffler and if i go the sleath route do i need a fuel commander to rebalance the fuel mixture??

 

Do NOT use a car muffler, in my experience it was louder, the stealth muffler is the way to go, and you should not have to remap your computer

 

have seen on here where some have used the aftermarket stealth muffle and liked it.