I own a 92 FatBoy w/SE Heads, pistons, SE-57 cam, roller rockers etc. My mufflers got damagedwhen someone backed into them with there car. I found new ones still in thereoriginal unopened boxson the internetthat are both called Screaming eagle so my question is which one has the most freeflow.

Part # 80086-84A is for up to1994, the muffler has Harley Davidson name engraved on it, but the box part number has the screaming name.

Part # 80029-95B is for 1995 to 1999, the muffler has Screaming Eagle engraved on it & the box part number also has the screaming name. Even though this part says 1995 to 1999 they match the ones on my FatBoy.

Thanks in advance if someone can tell me which pair has the most Free Flow so I can buy the right pair.
Pat

 

I've had a similar quest for older mufflers also and bought some that "fit" but were nothing like the old ones I had.

Typically, the older the number, the better. ie The older model muffler had easily removable baffles that you could tune to suit yourself. The later ones... you have to nearly destroy completely to remove the internals and then spend a lot of fabrication time to tune.

I've never physically had my hands on the part #'s you mentioned, but from my experience, and if I were you, I'd go with the 80086-84 Hope this is of some help