Too bad they don't make the standard HMF pipe for your Eiger. I put one on my Rincon and it's just friggin brutal now.

 

OK, got the dyno chart from FMF for the Powerline on a Foreman (didn't have it on the Eiger). Looks like there is only a 1 to 1.5 HP gain from 15 mph up. Seing this, I don't know if it is worth the money. Big gun claims about a 4 HP gain in that same region. Still trying to get a chart from them.