which ignition coil would you suggest for an 04 sxt, msd or screamin demon? is there a big difference between the two? modern performance has the msd and howell has the screamin demon.

 

Howell also has MSD coils too. Look at the reviews from Howell.
Personally I would go with MSD.

 

Why are you getting a coil? Both of the coils listed are very marginally better than the stock coil. Unless you are having problems with your stock one, there is no reason to get another one. IF you do, get the MSD though, just a personal recomendation, but they are made better.